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Electrophoresis. 2000 Jan;21(2):334-7.

Application of electrophoresis technology to DNA analysis.

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  • 1Department of Legal Medicine, Tokyo Women's Medical University, School of Medicine, Japan. xiuling@research.twmu.ac.jp


We used the variable number tandem repeat (VNTR) polymorphism and the ten short tandem repeat (STR) polymorphisms to study a number of disputed paternity cases in the Japanese population. For the determination of VNTR locus (D1S80) and the ten STR loci (vWA, F13B, TH01, TPOX, CSF1PO, F13A01, LPL, D3S1744, D12S1090, D18S849) we used polymerase chain reaction (PCR) amplification and the vertical polyacrylamide gel electrophoresis technique followed by SYBR green I staining. The irregular repeats were analyzed by sequencing from bands of vertical polyacrylamide gel electrophoresis using the latest gene analyzing equipment, the ABI PRISM 310 Genetic Analyzer. The probable genotypes of the deceased putative father were deduced by Komatu's method from the genotypes of the widow and the genotypes of their children. The calculation of paternity probability used the Essen-Moller formula and Bayes's theorem. Calculated in eleven loci, the distinguishing probabilities (DP) and the mean exclusion chance (MEC) were 0.9999 and 0.9989, respectively. Therefore, information obtained from eleven DNA polymorphisms is enough to determine paternity plausibility.

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