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PAGE analysis of APC 1A promoter methylation. Lane M: 50 bp molecular ladder Lanes 1-14: amplicons from paired samples. Case 1 and 5: Unmethylated APC 1A promoter Cases 2, 3, 4 and 6: Methylated APC 1A promoter C1 and C2: Internal unmethylated and methylated human DNA controls.
