Definition of "phosphorylation" [phosphorylation]

• The process of transferring a phosphate group from a donor to an acceptor; often catalysed by enzymes (noun)

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• "A number of years were to elapse before it became apparent that reversible protein phosphorylation is a general process affecting countless cellular proteins."
• "Reversible protein phosphorylation is responsible for regulation of processes as diverse as mobilization of glucose from glycogen, prevention of transplant rejection by cyclosporin, and development of a cancer form like chronic myeloic leukemia."
• "Parnas soon postulated a phosphate cycle, whereby the use of one ATP for phosphorylation is balanced by regeneration of ATP during subsequent steps in glycolysis."