Allelic ladder is important part of STR kit and ensure the precise genotype of allelic.
等位基因分型标准物是STR检测试剂盒的组成部分，能够保证各等位基因分型的准确性。
Technology of molecular cloning was employed to construct standard allelic ladder of DYS643 locus and used for DYS643 genotyping.
并通过分子克隆技术制备dys643基因座的等位基因分型标准物。
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