Figure 3

Photograph of methylation-specific PCR. The sizes of PCR products are 151 bp for unmethylated p16^INK4A, 150 bp for methylated p16^INK4A, 270 bp for unmethylated p57^KIP2, and 263 bp for methylated p57^KIP2 (L, ladder; N, control gastric mucosa; T, tumor; IVNT, in vitro negative control).