Figure 1. Multiplex PCR amplification product of the GSTT1, GSTM1 and internal control β-globin genes. The amplified products were separated by electrophoresis on 2% agarose gel. Lane L, 100bp DNA ladder; lane 1, 4, 9, and 10, T1/M0 genotype (459 bp and 268 bp fragments); lane 2, 3, and 8, T1/M1 genotype (459 bp, 268 bp, and 209 bp fragments); lane 5, T0/M1 genotype (268 bp and 209 bp fragments); lane 6, 7, and 11, T0/M0 genotype (268 bp fragments).