Abstract

We performed DNA typing from blood stains stored at room temperature for 22–30 years, using AmpFlSTR Yfiler PCR amplification Kit and PowerPlex Y System to extract and amplify the DNA and performing electrophoresis with an ABI 310 Genetic Analyzer. We identified alleles using GeneMapper ID v3.2.1 software. We found that long-term storage tended to reduce the number of detectable loci in the blood stains and that it was easier to detect the loci of smaller amplicons than larger amplicons.

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