Promoter methylation status of hMLH1, MGMT, and CDKN2A/p16 in colorectal adenomas

Figure 1 CpG island methylation at three loci and the microsatellite instability phenotype in G I (n = 20), G II (n = 18), G III (n = 21) and G IV (n = 20). The rows represent individual cases and the dark boxes indicate methylation or microsatellite instability (MSI) phenotype; the three high-level MSI (MSI-H) cases are also indicated.