(organic chemistry) The reaction of a substance with acetic acid or one of its derivatives; the introduction of one or more acetyl groups into a substance.
(chemistry) The addition of a methyl group to a molecule.
the process of introducing an acetyl group into a compound;
‘the acetylation of cyclooxygenase-2 by aspirin’;
(genetics) The addition of a methyl group to cytosine and adenine residues in DNA that leads to the epigenetic modification of DNA and the reduction of gene expression and protein production.
Acetylation (or in IUPAC nomenclature ethanoylation) is an organic esterification reaction with acetic acid. It introduces an acetyl functional group into a chemical compound.
In the chemical sciences, methylation denotes the addition of a methyl group on a substrate, or the substitution of an atom (or group) by a methyl group. Methylation is a form of alkylation, with a methyl group replacing a hydrogen atom.