Merge from Replication fork discuss Talk DNAreplication Merge from Replication fork date May 2009 Image DNAreplication split.svg thumb 200px right DNAreplication. The double helix is unwound and each ... replication is a biological process that occurs in all life on Earth living organisms and copies their DNA ... fidelity for DNAreplication. ref cite book author Berg JM, Tymoczko JL, Stryer L, Clarke ND title ... books bv.fc,kgi?rid stryer.chapter.3740 Chapter 27 DNAReplication, Recombination, and Repair ref ... bv.fcgi?rid mboc4.chapter.747 Chapter 5 DNAReplication, Repair, and Recombination ref In a cell biology cell , DNAreplication begins at specific locations in the genome, called origin of replication ... bofghoks bv.fcvbngi?rid stryer.section.3794 Chapter 27, Section 4 DNAReplication of Both Strands Proceeds ..., forms a replication fork . In addition to DNA polymerase , the enzyme that synthesizes the new ... with the fork and assist in the initiation and continuation of DNA synthesis. DNAreplication can .... DNA polymerase s are a family of enzyme s that carry out all forms of DNAreplication. ref cite ... process Main Prokaryotic DNAreplication Eukaryotic DNAreplication Origins For a cell to divide, it must ... 1 http www.ncbi.nlm.nih.gov books bv.fcgi?rid mboc4.section.754 Chapter 5 DNAReplication Mechanisms ref This process is initiated at particular points in the DNA, known as origin of replication origin ... name origins Origins contain DNA sequences recognized by replication initiator proteins e.g., dnaA in E ... replication by DNA Polymerase, and another DNA Polymerase enters to fill the gaps. When this is complete ... continues, the original DNA strands continue to unwind on each side of the bubble, forming a replication ... origins within these. citation needed date January 2011 Replication fork Image DNAreplication en.svg thumb 300px right Many enzymes are involved in the DNAreplication fork. Main Replication fork The replication fork is a structure that forms within the nucleus during DNAreplication. It is created ... more details
DNAreplication in eukaryotes is much more complicated than in prokaryotes , although there are many similar aspects. Eukaryotic cells can only initiate DNAreplication at a specific point in the cell cycle, the beginning of S phase . Mechanism Location in cell cycle DNAreplication in eukaryotes occurs ... is similar in both the protozoa and metazoa . Preparation in G1 phase The first step in DNAreplication is the formation of the Pre replication complex pre initiation replication complex the pre ... is a hexamer of related proteins and remains bound to the origin, even after DNAreplication occurs ... complex then recruits another protein called Cdc45 , which then recruits all of the DNAreplication proteins to the replication fork. At this stage the origin fires and DNA synthesis begins. Activation of a new round of replication is prevented through the actions of the cyclin dependent kinases and a protein ... in the G0 stage of the cell cycle are prevented from initiating a round of replication because the Mcm proteins are not expressed. At least three different types of eukaryotic DNA polymerase s are involved in the replication of DNA in animal cells POL , Pol and POL . Polymerase DNA directed , alpha ... cite journal author Elizabeth R. Barry Stephen D. Bell date 12 2006 title DNAReplication in the Archaea ... Participates in Leading Strand DNAReplication journal Science volume 317 page 127 130 pmid ... ref . See also DNAreplication References reflist DNAreplication Category DNAreplication tr karyotlarda ... of replication origins of replication . Some origins are well characterized, such as the autonomously ... as licensing, but a licensed pre RC cannot initiate replication in the G1 phase Current models ... to be the major DNA helicase in eukaryotic organisms. Once binding of MCM occurs, a fully licensed ... an RNA primer , and then with DNA Pol elongating that primer with DNA nucleotides. After around 20 ... Scott D McCulloch Thomas A Kunkel date 01 2008 title The fidelity of DNA synthesis by eukaryotic replicative ... more details
Unreferenced date March 2007 DNAreplication in prokaryote s is exemplified in E. coli . It is bi directional and originates at a single origin of replication OriC . Initiation The initiation of DNAreplication ... proteins to opposite ends of the melted DNA. This is where the replication fork will form. Recruitment ... strands of DNA is 3 5 while the other is 5 3 . To solve this, replication occurs in opposite ... . Termination Termination of DNAreplication in E. coli is completed through the use of termination ... one direction, but not the other. DNAreplication initially produces two catenated or linked circular .... Regulation Regulation of DNAreplication is achieved through several mechanisms. Mechanisms involve .... After DNAreplication is complete, this number is halved, thus DNAreplication cannot occur ... serve to downregulate DNAreplication so that it only occurs once per cell cycle, preventing over replication of DNA. DNAreplication Category DNAreplication ... negatively DNA supercoil supercoiled . Following this, a region of OriC Upstream and downstream DNA ... is 13 bp long, and AT rich which facilitates DNA melting melting because less energy is required ... to form five DnaA dimers. DnaC is then released, and the prepriming complex is complete. In order for DNAreplication to continue, Single strand binding protein SSB protein is needed to prevent the single strands of DNA from forming any secondary structure s and to prevent them from Annealing biology reannealing , and DNA gyrase is needed to relieve the stress by creating negative supercoils created by the action of DnaB helicase . The unwinding of DNA by DnaB helicase allows for primase DnaG an RNA polymerase to prime each DNA template so that DNA synthesis can begin. Elongation Once priming is complete, DNA polymerase III holoenzyme is loaded into the DNA and replication begins. The catalytic mechanism of DNA polymerase III involves the use of two metal ions in the active site , and a region ... more details
PBB geneid 81620 DNAreplication factor Cdt1 is a protein that in humans is encoded by the CDT1 gene ... CDT1 in DNAreplication and chromatin licensing journal J Cell Sci volume 115 issue Pt 7 pages ... H, Taraviras S, Lygerou Z, Nishimoto T title The human licensing factor for DNAreplication ... name entrez cite web title Entrez Gene CDT1 chromatin licensing and DNAreplication factor 1 pmid 81620 ... activity during S phase in order to prevent re replication of DNA and prevents it from ubiquitination ..., Dhar SK, Cvetic C, Walter JC, Dutta A title Inhibition of eukaryotic DNAreplication by geminin binding ... transcription factor requirement for DNAreplication and inhibition of mitosis journal EMBO J. volume ... pmid 10766247 url issue 6778 doi 10.1038 35007104 ref Interactions DNAreplication factor CDT1 has been ... without DNAreplication. The overexpression of Cdt1 causes rereplication in H. sapiens, which ... mechanisms monitoring proper initiation of DNAreplication, the journal of biological chemistry, 2005 ... to license DNA for replication in fission yeast. journal Nature volume 404 issue 6778 pages ... Weaver TL title Drosophila double parked a conserved, essential replication protein that colocalizes with the origin recognition complex and links DNAreplication with mitosis and the down regulation ... DNAreplication by geminin binding to Cdt1. journal Science volume 290 issue 5500 pages 2309 ... promotes pre RC formation and DNAreplication by stabilizing CDT1 in mitosis. journal EMBO J. volume ... gene 16 stub Category Proteins Category DNAreplication The PBB Controls template provides controls ... manual inspection no update protein box yes update summary no update citations yes DNAreplication ... , functions to license DNA by forming the pre replicative complex pre RC . Its activity during the cell ... pmid 11125146 doi 10.1126 science.290.5500.2309 url ref Orthologs CDT1 belongs to a family of replication ... month Aug. title The SCF Skp2 ubiquitin ligase complex interacts with the human replication licensing ... more details
Wiktionary replicationReplication may refer to Science Replication scientific method is one of the main principles of the scientific method, a.k.a. reproducibility Replication statistics , the repetition of a test or complete experiment Self replication , the process in which an entity a cell, virus, program, etc makes a copy of itself. DNAreplication or DNA synthesis, the process of copying a double stranded DNA molecule Semiconservative replication , mechanism of DNAreplication Self replicating machine s Computing Replication computer science , the use of redundant resources to improve reliability, fault tolerance, or performance Replication stochastic simulation , an individual run of a stochastic simulation model Replication optical media , the manufacture of CD and DVD discs by means other than burning writable discs Other Replication metallography , the use of thin plastic films to duplicate the microstructure of a component Option replication, a trading strategy to ensure at a certain date the payoff of an option without trading this option disambig fr R plication pl Replikacja ru ... more details
on each strand, which is vital in DNAreplication. Indeed, this reversible and specific interaction ... into DNA strands during processes such as transcription genetics transcription and DNAreplication .... This inhibits both transcription and DNAreplication, causing toxicity and mutations. As a result ... DNA transcription and replication, other similar toxins are also used in chemotherapy to inhibit rapidly ... DNAreplication. The details of these functions are covered in other articles here we focus on the interactions .... File DNAreplication en.svg thumb 450px right DNAreplication. The double helix is unwound by a helicase and topoisomerase . Next, one DNA polymerase produces the Replication fork leading strand copy. Another DNA polymerase binds to the Replication fork lagging strand . This enzyme makes discontinuous segments called Okazaki fragment s before DNA ligase joins them together. Replication Further DNAreplication Cell division is essential for an organism to grow, but, when a cell divides, it must ... as their parent. The double stranded structure of DNA provides a simple mechanism for DNAreplication ... and of these, the polymerases that copy the DNA base sequence in transcription and DNAreplication ...File DNA Structure Key Labelled.png thumb right 340px The structure of the DNA double helix . The atoms ... ADN animation.gif thumb The structure of part of a DNA double helix Deoxyribonucleic acid IPA en di ksi ra b .nju kle . k s d en us Deoxyribonucleic acid.ogg , or DNA , is a nucleic acid that contains ... organism s with the exception of RNA virus es . The main role of DNA molecule s is the long term storage of information . DNA is often compared to a set of blueprint s, like a recipe or a code, since ... s and RNA molecules. The DNA segments that carry this genetic information are called gene s, but other DNA sequences have structural purposes, or are involved in regulating the use of this genetic information. DNA consists of two long polymers of simple units called nucleotide s, with backbone ... more details
, Blackwell publishing, 2007 ISBN 1 4051 4715 6 ref This can either be DNAreplication in living organisms such as prokaryotes and eukaryotes, or RNA replication in RNA virus es, such as double stranded RNA viruses . DNAreplication may proceed from this point bidirectionally or unidirectionally. The specific structure of the origin of replication varies somewhat from species to species, but all ... replication complex , a protein complex that recognizes, unwinds, and begins to copy DNA. Types The two ... circular molecule of DNA, and typically only a single origin of replication per circular chromosome. ref cite journal author Mott ML, Berger JM title DNAreplication initiation mechanisms and regulation ... C, Grosse F, Weisshart K title Initiation of eukaryotic DNAreplication regulation and mechanisms ... E. coli is contained in a single circular DNA molecule of 4.6 x 10 6 nucleotide pairs. DNAreplication ... of the replication protein dnaA bind to the 9 mer repeats, and the DNA coils around this protein ... of enzymes that performs DNAreplication. ref name pmid1482121 cite journal author Baker TA, Wickner SH title Genetics and enzymology of DNAreplication in Escherichia coli journal Annual Review of Genetics ... , including humans, the DNA sequences at the replication origins vary. Despite this sequence variation ... is ready for activation. Once the replication origin is activated, the cell s DNA will be replicated ... Cdt1. Regulation of replication, such as this, is important as it prevents the DNA from being replicated more than once each cell cycle . See also OriDB OriDB the DNAReplication Origin Database References ... of bacterial and archaeal oriC s MeshName Replication Origin DNAreplication DEFAULTSORT Origin Of Replication Category DNAreplication cs Replika n po tek de Replikationsursprung es Origen ...The origin of replication also called the replication origin is a particular sequence in a genome at which replication is initiated. ref http www.blackwellpublishing.com wagner glossary.pdf Technical Glossary ... more details
Mergeto DNAreplication discuss Talk DNAreplication Merge from Replication fork date May 2009 Image Replication fork.svg right thumb Scheme of the replication fork. br a template, b leading strand, c lagging strand, d replication fork, e primer, f Okazaki fragments The replication fork is a structure that forms within the nucleus during DNAreplication . It is created by helicase s, which break the hydrogen bond s holding the two DNA strands together. The resulting structure has two branching prongs , each one made up of a single strand of DNA. These two strands serve as the template for the leading and lagging strands which will be created as DNA polymerase matches complementary nucleotides ... strand template. Replication Image DNAreplication en.svg thumb 450px right DNAreplication When replicating, the original DNA splits in two, forming two prongs which resemble a fork hence the name replication fork . DNA has a ladder like structure imagine a ladder broken in half vertically, along the steps. Each half of the ladder now requires a new half to match it. Because DNA polymerase can only synthesize a new DNA strand in a Directionality molecular biology 5 to 3 manner , the process of replication goes differently for the two strands comprising the DNA double helix . Leading strand The leading strand template is the strand of DNA being replicated continuously. It is the strand that is being continuously polymerized towards the replication fork. All DNA synthesis occurs 5 3 ... in Leading Strand DNAReplication journal Science volume 317 page 127 130 pmid 17615360 doi 10.1126 ... of replication and stops replication until a new RNA primer is placed. These fragments of DNA ... journal author Elizabeth R. Barry Stephen D. Bell date 12 2006 title DNAReplication in the Archaea ... different kinds of nucleotides . DNA ligase joins the fragments together. See also DNAreplication The replication ... chp30.htm DNAReplication and Repair DNAreplication Category DNAreplication cs Replika n vidlice ... more details
Image A DNA orbit animated small.gif right frame The A DNA structure. A DNA is one of the many possible double helical structures of DNA . A DNA is thought to be one of three biologically active double helical structures along with B DNA B and Z DNA . It is a right handed double helix fairly similar to the more common and well known B DNA form, but with a shorter more compact helical structure. It appears likely that it occurs only in dehydrated samples of DNA, such as those used in crystallographic experiments, and possibly is also assumed by DNA RNA hybrid helices and by regions of double stranded RNA. Structure A DNA is fairly similar to B DNA given that it is a right handed double helix with major ... turn. This results in a deepening of the major groove and a shallowing of the minor. Predicting A DNA structure An algorithm for predicting the propensity of a sequence to flip from B DNA to A DNA ... cite journal author Basham B, Schroth GP, Ho PS title An A DNA triplet code thermodynamic rules for predicting A and B DNA journal Proc Natl Acad Sci USA volume 92 issue 14 pages 6464 6468 year ... in the hydration of DNA surfaces can be used to distinguish between sequences that form A and B DNA. From this, a triplet code of A DNA propensities was derived as energetic rules for predicting A DNA formation. This code correctly predicted 90 of A and B DNA sequences in crystals and correlates with A DNA formation in solution. Thus, with our previous studies on Z DNA, we now have a single method to predict the relative stability of sequences in the three standard DNA duplex conformations. ref name Basham1995 cite journal author Basham B, Schroth GP, Ho PS title An A DNA triplet code thermodynamic rules for predicting A and B DNA journal Proc Natl Acad Sci USA volume 92 issue 14 pages ... of the Most Common DNA Forms Image A DNA, B DNA and Z DNA.png right thumb Side view of A , B , and Z DNA. Image B&Z&A DNA formula.jpg thumb right 250px The helix axis of A , B , and Z DNA. class ... more details
Infobox animanga Header name DNA image caption ja kanji D N A ja romaji D En Ei Ts Dokoka de Nakushita Aitsu no Aitsu genre Harem genre Harem , Science fiction Infobox animanga Print type manga author Masakazu Katsura publisher Shueisha publisher other flagicon FRA Editions Tonkam br flagicon GER Carlsen Comics br flagicon MEX Grupo Editorial Vid br flagicon ESP Planeta DeAgostini Comics br flagicon BRA Editora JBC demographic Sh nen manga Sh nen magazine Weekly Sh nen Jump first 1993 last 1994 volumes 5 volume list Infobox animanga Video type tv series director Jun ichi Sakata producer writer music studio Madhouse company Madhouse br Studio Deen network Animax , Nippon Television network other flagicon KOR Animax first 7 October 1994 last 23 December 1994 episodes 12 episode list Infobox animanga Video type ova director Jun ichi Sakata producer writer music studio Madhouse company Madhouse br Studio Deen released 1995 runtime episodes 3 episode list Infobox animanga Footer nihongo DNA D N A D En Ei Ts Dokoka de Nakushita Aitsu no Aitsu is a science ... 100 children that carry the Mega Playboy DNA, causing them and all their descendants to each have 100 ... to deal with. Karin reveals to Junta that she is a DNA Operator . Her job is to make alterations in people s DNA that will change their nature for the greater good of society. She intends to shoot the original Mega Playboy with a DCM DNA Control Medicine bullet that will alter his DNA in order ... DCM bullet. However, each time he transforms, his Mega Playboy DNA stabilizes more and more. nihongo Karin Aoi Aoi Karin anime voices Miina Tominaga Jessica Calvello A sixteen year old DNA ... Never Forget You Manga The DNA manga was published in Japanese magazine Weekly Sh nen Jump 1993 No. 36 ... es ca DNA cs DNA de DNA es DNA fr DNA ko DNA id DNA it DNA ja D N A pt DNA ru DNA fi DNA sv DNA tl DNA zh DNA ... more details
Pfam box Symbol RPA C Name Replication protein A C terminal Pfam PF08784 InterPro IPR014892 PROSITE PDB PDB 1dpu Replication protein A RPA is a protein that binds single stranded DNA in eukaryotic cells. ref cite journal title Replication protein A heterotrimeric, single stranded DNA binding protein required for eukaryotic DNA metabolism last Wold first MS journal Annual Review of Biochemistry year 1997 volume 66 issue 1 pages 61 92 doi 10.1146 annurev.biochem.66.1.61 pmid 9242902 ref During DNAreplication , RPA prevents single stranded DNA ssDNA from winding back on itself or from forming secondary structures. This keeps DNA unwound for the polymerase to replicate it. RPA also binds to ssDNA during the initial phase of homologous recombination , an important process in DNA repair and Meiosis Prophase I prophase I of meiosis . Like its role in DNAreplication, this keeps ssDNA from binding to itself self complementizing so that the resulting nucleoprotein filament can then bound by RAD51 Rad51 and its cofactors. ref cite journal title Homologous recombination in DNA repair and DNA damage tolerance last1 Xuan first1 L last2 Wolf Dietrich first2 H journal Cell Research year 2008 volume 18 issue 99 pages 99 113 doi 10.1038 cr.2008.1 pmid 18166982 ref References reflist Category Genetics genetics stub DNAreplicationDNA repair es Prote na de replicaci n A fr Prot ine de R plication A ru ... more details
Synthesis not in ring G sub 0 sub G0 phase Gap 0 Resting . Replication Timing refers to the order in which segments of DNA along the length of a chromosome are duplicated. DNAReplication Image ReplicationDomains.jpg thumb left 210px Figure 2 Replication proceeds via the nearly synchronous firing of clusters of replication origins that replicate segments of chromosomal DNAReplication domains at defined ... sequence of replication. In eukaryotic cells cells that package their DNA within a nucleus , chromosomes consist of very long linear double stranded DNA molecules. During the S phase of each cell cycle Figure 1 , all of the DNA in a cell is duplicated in order to provide one copy to each of the daughter cells after the next cell division. The process of duplicating DNA is called DNAreplication , and it takes place by first unwinding the duplex DNA molecule, starting at many locations called DNAreplication origins, followed by an unzipping process that unwinds the DNA as it is being copied. However, replication does not start at all the different origins at once. Rather, there is a defined ... cell. Replication Timing Profiles Image ReplicationTimingProfile.jpg thumb left 250px Figure 4 Example of a Replication Timing Profile . Each data point grey dot represents a different DNA sequence position ... 2010 Evaluating genome scale approaches to eukaryotic DNAreplication. Nat Rev Genet 11 673 684. ref ... Res 20 761 770. ref ref Pope BD, Hiratani I, Gilbert DM 2010 Domain wide regulation of DNAreplication ... place immediately after the DNA is synthesized. Therefore, replication timing dictates the time of assembly ... Y, Maekawa M 2010 Spatiotemporal regulation of DNAreplication in the human genome and its association ... 2 Category DNAreplication ... segment. Replication does not necessarily start at exactly the same origin sites every time ... each segment replication starts. Figure 2 shows a cartoon of how this is generally envisioned to occur ... more details
require host cell DNA polymerase polymerases to replicate their genome , while others, such as adenoviruses or herpes viruses, encode their own replication factors. However, in either cases, replication of the viral genome is highly dependent on a cellular state permissive to DNAreplication ... since 1992. User talk PhD Dre talk 22 00, 12 December 2007 UTC Viral life cycle Viral replication is the term ... process in the target host cells. Viruses must first get into the cell before viral replication can occur. From the perspective of the virus, the purpose of viral replication is to allow production and survival ..., the virus is able to continue infecting new hosts. Replication between viruses is greatly ..., which in turn have differing replication strategies themselves. David Baltimore , a Nobel Prize ... viruses based on their unique replication strategy. There are seven different replication strategies ..., 6th edition. Blackwell Publishing, 2007. ref . Class 1 Double stranded DNA viruses This type of virus ... virus. Class 2 Single stranded DNA viruses Viruses that fall under this category include ones that are not as well ... and Parvoviridae . They replicate within the nucleus, and form a double stranded DNA intermediate during replication. A human Circovirus called Transfusion Transmitted Virus TTV is included within ... viruses with RNA genomes, double stranded RNA viruses do not rely on host polymerases for replication to the extent that viruses with DNA genomes do. Double stranded RNA viruses are not as well studied as other classes. This class includes two major families, the Reoviridae and Birnaviridae . Replication ... 4 & 5 Single stranded RNA viruses These viruses consist of two types, however both share the fact that replication is primarily in the cytoplasm, and that replication is not as dependent on the cell cycle as that of DNA viruses. This class of viruses is also one of the most studied types of viruses, alongside the double stranded DNA viruses. Class 4 Single stranded RNA viruses Positive sense The positive ... more details
San Francisco year 1999 chapter 8. The Structure and Replication of DNA chapterurl http www.ncbi.nlm.nih.gov ... 1958 . The Replication of DNA in Escherichia coli . PNAS 44 671 82. DOI 10.1073 pnas.44.7.671 PMID 16590258. ref of DNAreplication Semiconservative replication would produce two copies that each contained one of the original strands and one new strand. Conservative replication would leave the two original template DNA strands together in a double helix and would produce a copy composed of two new strands containing all of the new DNA base pairs. Dispersive replication would produce two copies of the DNA , both containing distinct regions of DNA composed of either both original strands or both new strands. The decipher ing of the structure of DNA by James D. Watson Watson and Francis Crick .... According to the semi conservative theory, after one replication of DNA, we should obtain ... that only one line appeared after one replication. In order to conclude between those two, DNA ... of abnormal base O 6 ethylguanine, which is further misrecognized during DNAreplication and paired ... of Nucleic Acids References references Category DNAreplication cs Semikonzervativnost ko ja ...Image DNAreplicationModes.png thumb 300px right A summary of the three postulated methods of DNA synthesis Semiconservative replication describes the method by which DNA is replicated in all known cells. This method of replication is one of three proposed models ref name Griffiths cite book author Anthony ... with the template strands to form two double helical DNA molecules. The semiconservative model ... evidence The semi conservative theory can be confirmed by making use of the fact that DNA is made up ... and runs as follows Bacterial E coli DNA is placed in a media containing heavy nitrogen N15 , which binds to the DNA, making it identifiable. This DNA is then placed in a media with the presence ... N15 The DNA is placed in test tubes containing caesium chloride heavy compound and centrifuged ... more details
Autopoiesis Complex system DNAreplication Life Robot RepRap Self replicating machine self ...Image DNA chemical structure.svg thumb right 200px Molecular structure of DNA . seealso Biological reproduction Self replication is any behavior of a dynamical system that yields construction of an identical ... by cell division . During cell division, DNA is replicated and can be transmitted to offspring ... already present on computers. Self replication in robotics has been an area of research ... system is probably better characterized as something like a crystal . Classes of self replication ... 137 design dimensions grouped into a dozen separate categories, including 1 Replication Control, 2 Replication Information, 3 Replication Substrate, 4 Replicator Structure, 5 Passive Parts, 6 Active Subunits, 7 Replicator Energetics, 8 Replicator Kinematics, 9 Replication Process, 10 Replicator Performance ... code, so the program is trivially self reproducing. Self replicating tiling Image Self replication of sphynx ... per weight of wood or other biological substances, because self replication avoids the costs of labour ... replication is of practical relevance in compiler construction, where a similar chicken and egg problem occurs as in natural self replication. A compiler phenotype can be applied on the compiler s own ... self replication in that the process is directed by an engineer, not by the subject itself. Mechanical self replication main self replicating machine An activity in the field of robots is the self replication of machines. Since all robots at least in modern times have a fair number of the same ... . The Foresight Institute has published guidelines for researchers in mechanical self replication ... study of self replication Most of the research has occurred in a few areas Biology studies natural replication and replicators, and their interaction. These can be an important guide to avoid design ... replication, capital and assembly costs of molecular machines become impossibly large. Space resources ... more details
Citations missing date May 2008 Geo replication systems improve the distribution of data across geographically distributed Computer networking data networks . This enables improved end user experience of data heavy applications such as web portal s. Geo replication can be achieved using software, hardware or a combination of the two. Geo replication software Geo replication software is a network performance enhancing technology that is designed to provide improved access to portal or intranet content for uses at the most remote parts of large organizations. It is based on the principle of storing complete replicas of portal content on local servers, and then keeping the content on those servers up to date using heavily compressed data updates. Portal acceleration Geo replication technologies are used to provide replication of the content of portals, intranets, web applications, content and data between servers, across wide area networks Wide area network WAN to allow users at remote sites to access central content at Local area network LAN speeds. Geo replication software can dramatically increase the performance of data networks that suffer limited Bandwidth computing bandwidth , Latency ... over a WAN giving remote sites rapid access to web applications. Geo replication software solutions ... experience of a portal by accelerating its performance. Portal replication Remote users of web portals .... Geo replication technology is deployed to accelerate the remote end user portal performance ... data updates across a portal, geo replication systems often use differencing engine technologies ..., at the byte level, is ever sent to a server twice. Offline portal replication on laptops Advert date May 2008 Geo replication systems are often extended to deliver local replication beyond the server and down to the laptop used by a single user. Server to laptop replication enables mobile users to have ... forces. Geo replication systems col begin col 2 Infonic Syntergy Colligo Contributor See also Load ... more details
Orphan date February 2009 Wikify date April 2010 Replication , in metallography , is the use of thin plastic films to nondestructively duplicate the microstructure of a component. The film is then examined at high magnifications. Replication is a method of copying the topography of a surface by casting or impressing material onto the surface. It is the commonly used technique to duplicate surfaces that are inaccessible in metrology an NDT. Category Metallurgy Category Nondestructive testing Industry stub ... more details
In engineering , science , and statistics , replication is the repetition of an experiment al condition so that the variability associated with the phenomenon can be estimated. ASTM , in International standard standard E1847, defines replication as the repetition of the set of all the treatment combinations to be compared in an experiment. Each of the repetitions is called a replicate . Replication is not the same as repeated measurement s of the same item they are dealt with differently in statistical experimental design and data analysis . For proper Sampling statistics sampling , a process or batch of products should be in reasonable statistical control inherent random variation is present but variation due to assignable special causes is not. Evaluation or testing of a single item does not allow for item to item variation and may not represent the batch or process. Replication is needed to account for this variation among items and treatments. Example As an example, consider a continuous process which produces items. Batches of items are then processed or treated. Finally, tests or measurements are conducted. Several options might be available to obtain ten test values. Some possibilities are One finished and treated item might be measured repeatedly to obtain ten test results. Only one item was measured so there is no replication. The repeated measurements help identify observational error . Ten finished and treated items might be taken from a batch and each measured once. This is not full replication because the ten samples are not random and not representative of the continuous nor batch processing. Five items are taken from the continuous process based on sound statistical sampling. These are processed in a batch and tested twice each. This includes replication of initial ... twice each. This plan includes proper replication of initial samples and also includes batch to batch ... collection state collapsed Experimental design DEFAULTSORT Replication Statistics Category Design ... more details
Optimistic replication ref name saito2005 Cite journal last1 Saito first1 Yasushi last2 Shapiro first2 Marc title Optimistic replication journal ACM Computing Surveys volume 37 issue 1 pages 42 81 year 2005 doi 10.1145 1057977.1057980 postscript None ref also known as lazy replication ref name Ladin1992 cite journal author Ladin, R. coauthors Liskov, B. Shrira, L. Ghemawat, S. year 1992 title Providing high availability using lazy replication journal ACM Transactions on Computer Systems volume 10 issue 4 pages 360 391 doi 10.1145 138873.138877 ref ref name Ladin1990 cite conference author Ladin, R. coauthors Liskov, B. Shrira, L. year 1990 title Lazy replication exploiting the semantics of distributed services booktitle Proceedings of the Ninth Annual ACM Symposium on Principles of Distributed Computing pages 43 57 doi 10.1145 93385.93399 ref is a strategy for Replication 28computer science 29 replication in which replicas are allowed to diverge. Traditional pessimistic replication systems ... a single copy of the data all along. Optimistic replication does away with this in favor ... either difficult or even insoluble. Algorithms An optimistic replication algorithm consists of five .... Examples One well known example of a system based on optimistic replication is the Concurrent Versions ... the changes which a user pushes, they are permanently committed. A special case of replication ..., and then to Merge 28revision control 29 merge these two datasets together. Note, however, that replication ... See http tools.ietf.org html rfc677 Rfc677 Multi master replication Multi master database replication ..., P. Patrick O Neil O Neil, P. Dennis Shasha Shasha, D. year 1996 title The dangers of replication and a solution ... in which replication delays become particularly noticeable is when the database system is at a high .... The replication behaviour of such an installation may differ from a live environment in ways that mean that replication lag is unlikely to be observed in testing masking replication sensitive ... more details
Refimprove date May 2008 Synthetic replication is the process by which a financial asset s payoff is exactly replicated by trading other securities. ref citebook title Applied Equity Valuation author T. Daniel Coggin, Frank J. Fabozzi year 1998 publisher John Wiley and Sons isbn 1883249511 ref For instance Black Scholes theory claims vanilla option pricing can be achieved through the use of stock and zero coupon bond . References refs Category Finance Business stub ... more details
HISTORY Indented line Cellular Reproduction process of Meiosis was discovered by Oscar Hertwig in 1876. Mitosis was discovered several years later in 1882 by Walther Flemming. ref cite book last Barbieri first Marcello title The Organic Codes An Introduction to Semantic Biology year 2003 publisher Cambridge University Press location New York url http catdir.loc.gov catdir samples cam033 2002073767.pdf ref Indented line Hertwig studied sea urchins, and noticed that each egg contained one nucleus prior to fertilization and two nuclei after. This discovery proved that one spermatozoon could fertilize an egg, and therefore proved the process of meiosis. Hermann Fol continued Hertwig s research by testing the effects of injecting several spermatozoa into an egg, and finding that the process did not work with more than one spermatozoa. ref cite book last Barbieri first Marcello title The Organic Codes An Introduction to Semantic Biology year 2003 publisher Cambridge University Press location New York url http catdir.loc.gov catdir samples cam033 2002073767.pdf ref References references Uncategorized date April 2011 ... more details
DNA synthesis commonly refers to DNAreplicationDNA biosynthesis in vivo DNA amplification Polymerase chain reaction enzymatic DNA synthesis in vitro DNA amplification Oligonucleotide synthesis chemical synthesis of nucleic acids Gene synthesis physically creating artificial gene sequences disamb ... more details
A pre replication complex pre RC is a protein complex that forms at the origin of replication during the initiation step of DNAreplication . The proteins involved in the pre RC are essential for DNAreplication. The Prokaryotic Pre RC In prokaryotes , the pre RC is made up of the following factors A replication initiation factor such as dnaA A primase such as dnaG , which generates an RNA primer to be used in DNAreplication. A DNA holoenzyme , which is actually a complex of enzymes that performs the actual replication. A more specific explanation of what kind of replication this is should be added, as there are many types of DNAReplication with many different enzymes. The Eukaryotic Pre RC In eukaryotes , the pre RC is made up of the following factors A six subunit complex called Origin Recognition Complex ORC which binds to the origin. Two regulatory proteins called Cdc6 and Cdt1 which are recruited by ORC. The MCMs Minichromosome Maintenance proteins , the putative helicase complex. These proteins assemble on cellular origins in G1 phase of the cell cycle . Once these proteins are assembled, the MCMs are phosphorylated and DNAreplication begins. References Eukaryotic DNAreplication initiation summary http www.pubmedcentral.nih.gov picrender.fcgi?tool pmcentrez&blobtype pdf&artid 138988 DNAreplication Cell biology stub Category DNAreplication ru ... more details
Refimprove date December 2009 The replication factor C , or RFC, is a five subunit ref MeshName Replication Protein C ref protein complex that is required for DNAreplication . The Protein subunit subunits of this heteropentamer are named RFC1 Rfc1 , RFC2 Rfc2 , RFC3 Rfc3 , RFC4 Rfc4 , and RFC5 Rfc5 in S. cerevisiae . RFC is used in eukaryotic replication as a clamp loader, similar to the Complex in E. coli . Its role as clamp loader involves catalysing the loading of Proliferating Cell Nuclear Antigen PCNA on to DNA. It binds to the 3 end of the deoxyribonucleic acid DNA and uses ATP hydrolysis to open the ring of PCNA so that it can encircle the DNA. References Reflist DNAreplication DEFAULTSORT Replication Factor C Category DNAreplication Protein stub ... more details
nucleotide. Primers consist of RNA and or DNA bases. In DNAreplication, the first two bases are always ... to unwind DNA from a double strand structure to a single strand structure to facilitate replication of each strand consistent with the semiconservative model of DNAreplication. Error correction is a property of some, but not all, DNA polymerases. This process corrects mistakes in newly synthesized DNA. When an incorrect base pair is recognized, DNA polymerase reverses its direction by one base pair of DNA. The 3 5 exonuclease activity of the enzyme allows the incorrect base pair to be excised ... can re insert the correct base and replication can continue. Various DNA polymerases are extensively used in molecular biology experiments. Variation across species DNA polymerases have highly ... WEHI at 1 45 minutes in Polymerases DNAreplication Category EC 2.7.7 Category DNAreplication Category ...Image DNA polymerase.png thumb 3D structure of the DNA binding helix turn helix motifs in human DNA polymerase beta A DNA polymerase is an enzyme that catalyze s the polymerization of deoxyribonucleotide s into a DNA strand. DNA polymerases are best known for their Negative feedback feedback role in DNAreplication , in which the polymerase reads an intact DNA strand as a wikt template template and uses it to synthesize the new strand. This process copies a piece of DNA. The newly polymerized molecule .... DNA polymerases use magnesium ions as Cofactor biochemistry cofactors . Human DNA polymerases are 900 1000 amino acids long. Function Image DNA polymerase.svg thumb 200px right DNA polymerase with proofreading ability DNA polymerase can add free nucleotides to only the 3 end of the newly forming strand. This results in elongation of the new strand in a 5 3 direction. No known DNA polymerase is able to begin a new chain de novo . DNA polymerase can add a nucleotide onto only a preexisting 3 hydroxide ... special DNA polymerases, such as Hepatitis B virus DNA polymerase . These may selectively replicate ... more details
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