Agarose gel electrophoresis (2%) of PCR-RFLP of the GSTP1 variant Ile105Val (A to G transition). M lane is 100 bp DNA ladder, Lane 1 contain variant GSTP1 (Val/Val), Lane 2 contain variant GSTP1 (Ile/Val) and Lane 3 contain GSTP1 (Ile/Ile). Band of Fragment of 9 base pairs being very small in size not shown in picture.