Genetic Polymorphism of Cancer Susceptibility Genes and HPV Infection in Cervical Carcinogenesis

Figure 1

Genotyping of GSTM1 and GSTT1 by multiplex PCR. Lane 1: null GSTM1 genotype (absence of 215 bp fragment). Lane 2: null GSTT1 genotype (absence of 480 bp fragment). Lane 3: null GSTM1 and GSTT1 genotypes (absence of 215 and 480 bp fragments). Lane 4: present GSTM1 and GSTT1 genotypes. β-globin as a positive control is detected as 268 bp fragment.