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methylation

[meth-uh-ley-shuh n] /ˌmɛθ əˈleɪ ʃən/
noun, Chemistry
1.
the process of replacing a hydrogen atom with a methyl group.
Origin
1875-1880
1875-80; methylate + -ion
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for methylation
  • methylation typically silences genes so that they are not expressed.
  • But when something goes awry, methylation can unleash a tumor by silencing a gene that normally keeps cell growth in check.
  • methylation turns off certain sections of genetic code.

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