Polymorphisms in programmed death-1 gene are not associated with chronic HBV infection in Chinese patients

Figure 1 Gel electrophoresis patterns of PD-1. 1 and PD-1.2. A: The amplified fragments of PD-1.1 were digested with MspI: the polymerase chain reaction (PCR) product size was 265 base pairs (bp) which was digested to 180 and 85 bp, the genotype was identified as AA; if not, it was digested to 180, 125, 85 and 55 bp and was identified as AG; and if only digested to 125, 85 and 55 bp, its genotype was identified as GG. B: The amplified fragments of PD-1.2 were also digested with MspI: the PCR product size was 263 bp which was digested to 150 and 113 bp; if the product was digested, the genotype was identified as GG; if not, it was identified as AA, the genotype AG appeared as 263, 150 and 113 bp.