Figure 1. Agarose gel electrophoresis of the polymerase chain reaction based restriction fragment length polymorphism (PCR-RFLP) analysis of XPD and XRCC1. (Lanes 1–5) PstI digested fragments of exon 23 c.2298A>C XPD SNP. (Lane 1) AA genotype consisting of two fragments; 290 and 146 bp. (Lanes 2, 3, and 5) AC genotype consisting of four fragments; 290, 227, 146 and 63 bp. (Lane 4) CC genotype consisting of three fragments; 227, 146, and 63 bp. (Lanes 6–9) MspI digested fragments of exon 10 c.1316G>A XRCC1 SNP. (Lane 7) GG genotype consisting of two fragments; 148 and 94 bp. (Lanes 6 and 8) AG genotype consisting of three fragments; 242, 148, and 94 bp. (Lane 9) AA genotype consisting of an undigested fragment of 242 bp.