Bisulfite sequence analysis of NGX6 promoter. Methylation status of CpG sites around the NGX6 promoter region were analyzed in colon cancer cell lines HT-29 and SW480, colon cancer tissue (T38) and adjacent normal colorectal tissues (N38). Region spans -233 to +150 including 34 CpG sites. Each row represents an individual subclone. White circles represent unmethylated CpGs. Black circles represent methylated CpGs.