Abstract
Since its introduction, high-resolution melting (HRM) analysis has been used for genotyping of various types of sequence alterations. In this study, we report the use of HRM for genotyping of the 1-kb insertion/deletion polymorphism, involving a problematic region of five consecutive Alu elements, that is associated with myotonic dystrophy type 1. We combined a three-primer polymerase chain reaction (PCR) amplification approach with HRM using two primer sets. Analyses based on curve shapes are sensitive enough to differentiate between genotypes with both primer sets. In addition, the newly designed insertion-specific primer from the second primer set equalizes the allele-specific amplicon lengths, thereby reducing the possibility of preferential amplification of shorter fragments.
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