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Methylation of the NGX6 promoter in colorectal cancer. (A) Methylation of the NGX6 promoter in colon cancer cells HT-29 and SW480. (B) DNA from 40 colorectal cancer tissue (T) and 40 adjacent normal colorectal tissues (N) were bisulfite-modified and analyzed for methylaion of the NGX6 promoter by methylation-specific PCR analysis. "DL": DNA marker2000; "P": positive methylated control; "N": negative unmethylated control; "M": methylated NGX6; "U": unmetylated NGX6.
