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Genotyping of p53 codon 72 by PCR-RFLP. Lane 1: Arg/Arg homozygote. Lane 2: Arg/Pro heterozygote. Lane 3: Pro/Pro homozygote. The fragment of 199 bp is the nondigested PCR product from the Pro allele. Fragments of 113 and 86 bp result from BstUI digestion of the Arg allele.
