Relationship between genetic polymorphisms of alcohol and aldehyde dehydrogenases and esophageal squamous cell carcinoma risk in males

Figure 1 PCR-RFLP analyses of exon 3, codon 47 polymorphism of ADH2. M represents a size marker. Sample 1 is ADH2*1/*1; samples 2, 4, and 7 are ADH2*1/*2; samples 3, 5, and 6 are ADH2*2/*2. + and - represent the PCR product with and without restriction enzyme MaeIII.

Figure 2 PCR-RFLP analyses of exon 12, codon 487 polymorphism of ALDH2. M represents a size marker. Sample 1 is ALDH2*2/*2; sample 3 is ALDH2*1/*1; samples 2 and 4 are ALDH2*1/*2. + and - represent the PCR product with and without restriction enzyme MboII.