Relationship of tobacco smoking, CYP1A1, GSTM1 gene polymorphism and esophageal cancer in Xi’an

Figure 1 Identify the GSTM1 genotype. M:100 bp DNA ladder, 3,4 were GSTM1 exist 2,5 were GSTM1 deletion; 1 positive control, 6 negative control, 7 was blank control (without DNA template)

Figure 2 Identified the genotypes of CYP1A1. M: 100 bp DNA ladder; 1(A),2(B) represent Ile/Ile genotype; 3(A), 4(B) represent Ile/Val genotype; 5(A), 6(B) represent Val/Val genotype; 7(A),8(B) as blank control( without DNA template).