Definition:
A biochemical process in which a phosphate group (PO4 ³-) is added to a molecule, typically a protein, by an enzyme called a kinase. This addition of a phosphate group often occurs at specific amino acids in the protein, such as serine, threonine, or tyrosine, and it can significantly change the protein’s structure, function, or activity. Phosphorylation is a crucial mechanism of cellular regulation and plays a key role in controlling various cellular processes.
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