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Gel electrophoresis methylation-specific polymerase chain reaction (MSP) results for CHFR. Note the presence of the 155–base pair (bp) methylation (M) band in cases 1, 4, 6, 7, 15, and 22 and the unmethylated (U) 155-bp product in cases 1, 15, and 22; the latter indicates an admixture of normal and tumor cells. H2O indicates water.
