User:Ribrob/Drafts

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=DNA ligase=

Variety
There is much variety in ligases present in different species, however homology also exists.

Mammalian ligases
(see )

Plant ligases
There are three DNA ligases known to exist in plants, including DNA ligase I and IV, which are homologs of the mammalian varieties and found throughout eukarya. However a third DNA ligase, DNA ligase VI, may also be found in higher plants with likely roles in DNA repair. DNA ligase VI appears to be unique to higher plants, though is at present much less well characterised.

Yeast ligases
Yeast has just two DNA ligases, DNA ligase I and IV homologs.