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. 2016 May 17;3(7):547–551. doi: 10.1002/acn3.307

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© 2016 The Authors. Annals of Clinical and Translational Neurology published by Wiley Periodicals, Inc on behalf of American Neurological Association.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Representative examples of the different variable number of tandem repeats (VNTR) genotypes identified using polymerase chain reaction (PCR) and gel electrophoresis. PCR revealed 5 distinctive VNTR alleles, based on a repetitive genetic motif of 37 base pairs in size, and 7 different genotypes (lane 1–7). The derived VNTR sizes were as follows: VNTR 1 (389 bp); VNTR 2 (426 bp); VNTR 3 (463 bp); VNTR 4 (500 bp); and VNTR 5 (537 bp). The two flanking lanes are PCR molecular weight ladders (M) with 100 bp difference in size. For each genotype, the number and percentage of patients was indicated.