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Representative methylation of metallothionein 1M and metallothionein 1G gene promoters by methylation-specific polymerase chain reaction. A: The methylated and unmethylated sequences of MT1M were 124 and 163 bp, respectively; B: The methylated and unmethylated sequences of MT1G were 96 and 135 bp, respectively. N: Negative control; M: Methylation-specific primers; U: Unmethylation-specific primers.
