A biochemical reaction in which a phosphate group is introduced into a molecule. Controlled by the enzyme phosphorylase, it is the initial state in many natural biochemical processes, such as the conversion of adenosine diphosphate (ADP) to energy-rich adenosine triphosphate (ATP). Phosphorylation is also an important reaction in the activation or deactivation of enzymes, often under hormone control.
Related category• BIOCHEMISTRY
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