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Topic: Restriction sites

	Exercise #4B - Physical Mapping of Recombinant Plasmid DNA by Digestion with Restriction Endonucleases
		Restriction enzymes are site-specific endonucleases; that is, they cut DNA molecules only at sites where a specific sequence of bases occurs that the enzyme recognizes.
		Restriction endonucleases are enzymes that cleave both strands of double stranded DNA after recognizing specific nucleotide sequences on the molecule.
		Restriction enzymes "restrict" the host range of bacteriophage to strains of bacteria containing the identical set of restriction/modification genes present in the strain in which the virus was originally replicated.
	www.unr.edu /biology/Biol395_S_05/Lab4b.htm (2067 words)

	EMBOSS: frestdist (Site not responding. Last check: 2007-10-12)
		For my restriction fragments distance there is there is an implicit assumption of a Jukes-Cantor (1969) model of change, The user can also set the parameter of a correction for unequal rates of evolution between sites in the DNA sequences, using a Gamma distribution of rates among sites.
		where n++ is the number of sites contained in both species, n+- is the number of sites contained in the first of the two species but not in the second, and n-+ is the number of sites contained in the second of the two species but not in the first.
		The presence of a site is indicated by a "+" and the absence by a "-".
	emboss.sourceforge.net /embassy/phylipnew/frestdist.html (1829 words)

	RE Resource, Glossary
		When determining the number of units of restriction enzyme needed for a digest, consideration must be given to the number of recognition sites in 1µg of the sample DNA compared with the number of recognition sites in 1µg of the unit definition DNA.
		A restriction enzyme recognition sequence that is difficult to cleave using the appropriate reaction conditions using a small excess of enzyme.
		Restriction enzymes hydrolyze the diester bond to yield 5´-phosphate and 3´-hydroxide DNA fragments.
	www.promega.com /guides/re_guide/glossary/glossary1.htm (1271 words)

	Restriction enzyme - Wikipedia, the free encyclopedia
		A restriction enzyme (or restriction endonuclease) is an enzyme that cuts double-stranded DNA.
		Restriction enzymes therefore are believed to be a mechanism evolved by bacteria to resist viral attack and to help in the removal of viral sequences.
		The 1978 Nobel Prize in Medicine was awarded to Werner Arber, Daniel Nathans and Hamilton Smith for the discovery of restriction endonucleases, leading to the development of recombinant DNA technology.
	en.wikipedia.org /wiki/Restriction_enzyme (1201 words)

	Restriction Fragment Length Polymorphism
		Restriction fragment length polymorphism is the identification of specific restriction enzymes that reveal a pattern difference between the DNA fragment sizes in individual organisms.
		To discover RFLPs, restriction enzymes (RE) are used to cut DNA at specific 4-6 bp recognition sites.
		Some of these differences will produce new restriction sites (or remove them), and the banding pattern seen on a genomic Southern will thus be affected.
	www.iscid.org /encyclopedia/Restriction_Fragment_Length_Polymorphism (222 words)

	Restriction Mapping
		Restriction enzymes are enzymes that cut DNA at specific recognition sequences called "sites." They probably evolved as a bacterial defense against DNA bacteriophage.
		Restriction enzymes are endonucleases that recognize specific 4 to 8 base regions of DNA.
		Sites for each restriction enzyme are distributed randomly throughout a particular DNA stretch.
	faculty.plattsburgh.edu /donald.slish/Restmap.html (1307 words)

	MCDB 2150 -- Lecture 15
		There are many different restriction endonucleases, and each is highly specific for a restriction site, which usually consists of 4, 6, or 8 base pairs, with a few exceptions that will be discussed later.
		Frequency of cutting: Because of their restriction site specificity, the restriction endonucleases cut DNA into fragments whose average length is determined by the number of base pairs in the restriction site (and to a lesser extent by the ratio of bases in the DNA).
		Another trick that is sometimes used is to eliminate a naturally-occurring cut sites (or generate a new cut site) by changing the third bases of codons in ways that eliminate (or generate) restriction endonuclease cut sites without altering the amino acid coding of genes carried in the vector.
	www.colorado.edu /MCDB/MCDB2150Fall/notes99/99L15.html (2945 words)

	Restriction fragment length polymorphism Summary (Site not responding. Last check: 2007-10-12)
		Restriction maps that result from different patterns of distribution of restriction sites in the DNA of individuals within a population of organisms are called restriction fragment length polymorphisms (RFLPs).
		In molecular biology, the term restriction fragment length polymorphism (or RFLP) is used in two related contexts: as a characteristic of DNA molecules (arising from their differing nucleotide sequences) by which they may be distinguished, and as the laboratory technique which uses this characteristic to compare DNA molecules.
		The distance between the locations cut by restriction enzymes (the restriction sites) varies between individuals: so the length of the fragments varies, and the position of certain gel bands differs between individuals (thus polymorphism).
	www.bookrags.com /Restriction_fragment_length_polymorphism (1032 words)

	MCDB 2150 -- Lecture 14
		Restriction endonucleases: An endonuclease is an enzyme that can cleave the phosphodiester bonds of a nucleic acid at an internal site (as opposed to cleavage by an exonuclease, which can only remove nucleotides from one of the ends of a nucleic acid).
		Restriction sites: All of the restriction sites that we will be dealing with in this course are palindromes (they have the same double-stranded DNA base sequence in both directions).
		Another trick that is sometimes used is to eliminate naturally-occurring cut sites (or generate new cut sites) by changing the third bases of codons in ways that eliminate (or generate) restriction endonuclease cut sites without altering the amino acid coding of genes carried in the vector.
	www.colorado.edu /MCDB/MCDB2150Fall/notes00/L0014.html (3379 words)

	BCH5425 Molecular Biology and Biotechnology (Site not responding. Last check: 2007-10-12)
		The short restriction site sequence on the 5' end of the PCR primer will not hybridize, but as long as the 3' hybridizing region is long enough (i.e.
		The primary difference is that instead of the primer containing the entire restriction site sequence (say the six nucleotides of a six cutter) it will contain only the last three (and the other PCR primer will contain the complementary sequence for the first three).
		A disadvantage is that the same restriction site is incorporated into both ends so the PCR fragment cannot be ligated into a host vector in an orientation dependent manner.
	wine1.sb.fsu.edu /bch5425/lect24/lect24.htm (1135 words)

	BioMed Central \| Full text \| SiteFind: A software tool for introducing a restriction site as a marker for successful ...
		An alternative to sequencing is to simultaneously introduce a restriction site near the point mutation in manner such that the restriction site has no effect on the translated amino acid sequence.
		A simple method to confirm the presence of a point mutation prior to sequencing is to design the mutation of the sequence such that it introduces a novel restriction site, taking advantage of the redundancy of the genetic code [6-8].
		A novel restriction site within a few nucleotides of the point mutation is often sufficient to use as a marker.
	www.biomedcentral.com /1471-2199/6/22 (3813 words)

	restdist
		The R option toggles between a restriction sites distance, which is the default setting, and a restriction fragments distance.
		The T option is not available when you choose the original Nei/Li restriction fragment distance, which assumes a Jukes-Cantor (1969) model of DNA change, for which the transition/transversion ratio is in effect fixed at 0.5.
		While in the RESTML program there is an upper limit on the restriction site length (set by memory limitations), in RESTDIST there is no effective limit on the size of the restriction sites.
	evolution.genetics.washington.edu /phylip/doc/restdist.html (2454 words)

	8.2 RESTRICTION FRAGMENT LENGTH POLYMORPHISMS
		A restriction fragment length polymorphism is defined by the existence of alternative alleles associated with restriction fragments that differ in size from each other.
		Although the different-sized restriction fragments shown in Figure 8.2 can be followed readily in a genetic cross, one cannot tell, from these data alone, how they differ from each other at the molecular level.
		Since the rare restriction sites themselves are labeled, blotting and hybridization steps are eliminated and autoradiographs are obtained by direct exposure of gels to film.
	www.complextrait.org /archive/2001/HTML/silverbook/8.2.shtml (4463 words)

	Site Cleanup
		Site Mitigation and Brownfields Reuse Program EnviroStor Database The new EnviroStor database is an online search and Geographic Information System tool for identifying sites with known or potential contamination, and sites where DTSC's environmental oversight or review has been requested or required.
		A land use restricted site is a property where DTSC has placed limits or requirements on future use of the property due to varying levels of cleanup possible, practical, or necessary at the site.
		The land use restrictions on this list were required by the DTSC HWMP as a result of the presence of hazardous substances that remain on site after the facility (or part of the facility) has been closed or cleaned up.
	www.dtsc.ca.gov /SiteCleanup/index.cfm (1071 words)

	Conservation of Restriction Sites in Isolates of Streptococcus pneumoniae with Diverse Restriction Fragment Patterns -- ...
		Conservation of Restriction Sites in Isolates of Streptococcus pneumoniae with Diverse Restriction Fragment Patterns -- Hall and Duke 36 (6): 1805 -- Journal of Clinical Microbiology
		Conservation of Restriction Sites in Isolates of Streptococcus pneumoniae with Diverse Restriction Fragment Patterns
		mutations at restriction sites to diversity in restriction fragment
	jcm.asm.org /cgi/content/full/36/6/1805 (1637 words)

	Restriction enzymes and characterizing DNA.
		a positioning of genes on the chromosomal DNA molecule relative to restriction sites in the DNA.
		DNA fragments generated by restriction enzymes are often examined by gel electrophoresis, a process based on the principle that
		The preparation of detailed restriction maps can entail the digestion of a DNA sample under salt or pH conditions that are not optimal for a particular restriction enzyme, a practice that is relevant to the "star" activities of certain restriction endonucleases.
	www.attotron.com /pub/dnaquiz/Q3ENZ.htm (1313 words)

	Restriction sites - Wikipedia, the free encyclopedia
		Restriction sites, or restriction recognition sites, are particular sequences of nucleotides that are recognized by restriction enzymes as sites to cut the DNA molecule.
		The sites are generally palindromic, (because restriction enzymes usually bind as homodimers) and a particular enzyme may cut between two nucleotides within its recognition site, or somewhere nearby.
		For example, the common restriction enzyme EcoRI recognizes the sequence GAATTC and cuts between the G and the A on both the top and bottom strands, leaving an overhang (an end-portion of a DNA strand with no attached complement) on each end, of AATT.
	en.wikipedia.org /wiki/Restriction_sites (153 words)

	WatCut: An on-line tool for restriction analysis, silent mutation scanning, SNP-RFLP analysis (Site not responding. Last check: 2007-10-12)
		This is a plain-vanilla enumeration of the cleavage sites.
		Since the oligo may not span the polymorphic site, multiple mutations must all be on the same side of the SNP position.
		Cleavage sites outside this interval are not detected or reported; a size difference of ≥ 25 bp should still be detectable on a gel, and exclusion of enzymes outside this interval would be overly restrictive.
	watcut.uwaterloo.ca /watcut/watcut/template.php?act=help (4687 words)

	Using the Restriction Analysis Tool
		Note: When performing restriction analysis on a circular maps, Visual Cloning will assume that the DNA is circular and will add sites of enzymes whose recognition sequences overlap the imaginary 0 bp point.
		Each restriction site found is shown in a detailed list that includes the Enzyme name (in alphabetical order), the Site on the map where it cuts, its Recognition sequence, and the type of Ends resulting from the cut.
		To remove restriction sites from a map that were added from the results list, uncheck the check boxes in the Enzyme column for the sites you want to remove.
	www.redasoft.com /support/VCHelp/using_restriction_analysis.htm (1011 words)

	Restriction Maps
		The DNA to be restriction mapped it usually contained within a well-characterized plasmid or bacteriophage vector for which the sequence is known.
		The most straightforward method for restriction mapping is to digest samples of the plasmid with a set of individual enzymes, and with pairs of those enzymes.
		Since there is a single Kpn I site in the vector, the presence of a 1000 bp fragment tells you that there is also a single Kpn I site in the unknown DNA and that it is 1000 bp from the Kpn I in the vector.
	arbl.cvmbs.colostate.edu /hbooks/genetics/biotech/enzymes/maps.html (1204 words)

	Frequencies of Restriction Sites, New England Biolabs
		Detailed restriction maps can be found on DNA sequences and maps.
		The sites listed in these tables were identified by computer analysis of published sequences.
		When the same specificity is displayed by several enzymes, the site is listed by the name of the enzyme that is available from New England Biolabs.
	www.neb.com /nebecomm/tech_reference/restriction_enzymes/frequency_of_restriction_sites.asp (119 words)

	5 Restriction Mapping (Site not responding. Last check: 2007-10-12)
		The Wisconsin package includes several tools for locating restriction sites, determining restriction fragment lengths, and presenting the results in a variety of textual and graphical for mats.
		The map program is used to locate sites and produce a text file with the names the restriction enzymes above their recognition sites in the nucleotide sequence.
		Besides simply locating the recognition sites of enzymes, it is frequently of interest to know the molecular weights of the DNA fragments that would result from a particular digest.
	www.molbio.unmc.edu /courses/course-notes/chapter5.html (1414 words)

	Restriction Cloning: Plasmid Restriction maps and Restriction Sites
		The cloning technique that requires the restriction enzymes to cut the vector molecule and the molecule to be cloned.
		SimVector allows you to filter restriction enzymes, annotate restriction enzyme maps and perform restriction enzyme analysis.
		Plasmid Restriction maps are the graphical depiction of the locations within a known DNA sequence where the restriction enzymes will cut.
	www.premierbiosoft.com /plasmid_maps/glossary/restriction_cloning.html (101 words)

	EMBOSS: remap
		The cut sites are indicated by a slash character '\' that points to the poition between the nucleotides where the cuts occur.
		Any of the isoschizomers that are excluded from cutting, (either through restrictions such as the permitted number of cuts, blunt cutters only, single cutters only etc. or because their name has not been given in the input list of enzymes), will not be listed.
		The '-flatreformat' qualifier changes the display to emphasise the recognition site of the restriction enzyme, which is indicated by a row of '=' characters.
	www.psc.edu /general/software/packages/emboss/remap.html (1750 words)

	Mutagenesis in vitro
		The generation of maps of restriction enzyme sites, as well as sequence analysis, will be discussed in Other Types of Mapping.
		The possession of purified DNA of a known restriction map can be used to generate site-specific mutations in a variety of ways, but it is first critical to decide what kind of mutations are most useful for you.
		Deletion formation: By cutting at more than one restriction site in the cloned DNA and religating, it is possible to generate deletions of known end-points as shown in the figure below.
	www.bact.wisc.edu /Bact370/mutainvitro.html (838 words)

	Removing vector restriction sites - BioForum
		i have a chimeric gene insert engineered by silent mutations with several useful restriction sites so i can exchange domains of the chimeric gene insert and test for effects.
		some of these restriction sites are at the multipe cloning site (mcs), i.e Bam HI and Xho I. does anybody know of an easy method to remove these mcs restriction sites and incorporate a new one that is unique and not already engineered into the chimeric gene?
		Add or remove restriction sites to the 5' end of the primers as you wish (in your case remove everything, adding only BamHI and XhoI sites at the 5' end of the primers).
	www.protocol-online.org /forums/index.php?showtopic=17401 (639 words)

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