Fig. 3From: Heterozygote of TAP1 Codon637 decreases susceptibility to HPV infection but increases susceptibility to esophageal cancer among the Kazakh populationsPCR-RFLP assay for analyzing the TAP1 Codon333 and 637 polymorphisms. PCR product was digested by restriction enzyme and visualized in 3Â % agarose gel stained with ethidium bromide. (a) The typical genotypes of TAP1 Codon333 A/G. Lane 1: AG genotype (430,274 and 156Â bp); lane 2: AA genotype (274 and 156Â bp); lane 3: GG genotype (430Â bp). (b) The typical genotypes of TAP1 Codon637 A/G. Lane 1: AG genotype (405,260 and 145Â bp); lane 2: GG genotype (405Â bp); lane 3: AA genotype (260 and 145Â bp). M, molecular weight markerBack to article page