A METHOD FOR THE ENRICHMENT OF HETERODUPLEXES AND ITS USE IN MUTATION DETECTION

摘要

A method for selectively enriching heteroduplexes from a mixture of hetero- and homoduplexes comprising binding selectively said heteroduplexes to a heteroduplex binding protein thereby forming a complex between the heteroduplex and the protein. The method is characterized in that the protein is a modified form of a wild-type resolvase, which modified form in comparison to the wild type resolvase retains an ability to selectively bind to heteroduplexes, and has a modified ability to cleave heteroduplexes. In case one of the nucleic strands in the heteroduplexes derives from a sample and the other is a standard nucleic acid strand, the method may be used for detecting mismatches in the sample nucleic acid relative the standard nucleic acid.