Effects of Genetic Variants in the Nicotine Metabolism Pathway on Smoking Cessation

Figure 1

(a) First-step PCR results (1,961-bp) (b) second-step PCR results (1,181-bp). Lanes 1 and 2 are wildtype CYP2A6 (non  4/non  4); lanes 3 and 4 are heterozygous deletions (non  4/4); lanes 5 and 6 are the CYP2A6 deletion genotype (4/4).

(a)

(b)