Noun
protein phosphorylation (countable and uncountable, plural protein phosphorylations)
(biochemistry) The binding of phosphate to proteins to form phosphoproteins.
Protein phosphorylation is one of the most common forms of reversible protein posttranslational modification (PTM), with up to 30% of all proteins being phosphorylated at any given time. Source: Internet
Protein phosphorylation in particular plays a significant role in a wide range of cellular processes. Source: Internet