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In 2012 a modified RAD tagging method called double digest RADseq (ddRADseq) was suggested. [10] [11] By adding a second restriction enzyme, replacing the random shearing, and a tight DNA size selection step it is possible to perform low-cost population genotyping.
In molecular biology, XhoI is a type II restriction enzyme EC that recognise the double-stranded DNA sequence CTCGAG and cleaves after C-1. [1] Type II restriction endonucleases are components of prokaryotic DNA restriction-modification mechanisms that protect the organism against invading foreign DNA.
Exonuclease III (ExoIII) is an enzyme that belongs to the exonuclease family. ExoIII catalyzes the stepwise removal of mononucleotides from 3´-hydroxyl termini of double-stranded DNA. [1]
A restriction map is a map of known restriction sites within a sequence of DNA.Restriction mapping requires the use of restriction enzymes.In molecular biology, restriction maps are used as a reference to engineer plasmids or other relatively short pieces of DNA, and sometimes for longer genomic DNA.
In a similar manner, restriction enzymes are used to digest genomic DNA for gene analysis by Southern blot. This technique allows researchers to identify how many copies (or paralogues ) of a gene are present in the genome of one individual, or how many gene mutations ( polymorphisms ) have occurred within a population.
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BglII catalyses phosphodiester bond cleavage at the DNA backbone through a phosphoryl transfer to water. [1] Studies on the mechanism of restriction enzymes have revealed several general features that seem to be true in almost all cases, although the actual mechanism for each enzyme is most likely some variation of this general mechanism.
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