Deoxycytidine methylation and the origin of spontaneous transition mutations in mammalian cells.

Abstract excerpt

Previously we described a recurrent, site-specific G4784 --> A transition mutation affecting exon V of the Chinese hamster ovary cell RPS14 gene. Because the mutation is located within a CpG dinucleotide, we considered the possibility that deoxycytidine methylation might be responsible for the transition's unusually high frequency and site specificity. Therefore, we used a procedure based on the PCR amplification...

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