Agarose gel electrophoresis (2.5% agarose gel, 80V, 2 h) for the detection of CYP2B6 g.15582C>T SNP. M=Molecular weight marker; Lanes 1, 4, 5, 7–9=homozygous C/C genotype (319 and 92 bp); Lane 10=T/T genotype (210 bp, 109 bp, 92 bp); Lanes 2 and 6=heterozygous C/T genotype (319 bp, 210 bp, 109 bp, and 92 bp).