出典:Wiktionary
出典:『Wiktionary』 (2008/03/20 16:01 UTC 版)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/28 01:54 UTC 版)
Posttranslational modification (PTM) is the chemical modification of a protein after its translation. It is one of the later steps in protein biosynthesis, and thus gene expression, for many proteins.