Question

Phosphorylation of enzymes:_______.

a. always increases their activity.
b. generally occurs on Ser, Thr, and/or Tyr side chains and to a lesser extent on the His side chain.
c. is irreversible.
d. is one of only five known covalent forms of regulation.

Answer 1

generally occurs on Ser, Thr, and/or Tyr side chains and to a lesser extent on the His side chain