Retrieving "Signal Cascades" from the archives

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1. Enzymatic Function

   Linked via "signal cascades"

   Covalent Modification
   Many enzymes are regulated by the reversible covalent attachment or removal of chemical groups. Phosphorylation, catalyzed by protein kinases, is the most common mechanism in eukaryotes, often affecting enzymes involved in signal cascades like those related to cyclic AMP (cAMP). Acetylation and [adenylation](/entries/adenylation…