The efficiency of mispaired ligations by lambda integrase is extremely sensitive to context.

Abstract excerpt

The integrase protein (Int) of phage lambda is a well-studied representative of the tyrosine recombinase family, whose defining features are two sequential pairs of DNA cleavage/ligation reactions that proceed via a 3' phosphotyrosine covalent intermediate to first form and then resolve a Holliday junction recombination intermediate. We devised an assay that takes advantage of DNA hairpin formation at one Int...

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