Protein kinase A is activated by
A) phosphorylation of its catalytic subunit.
B) phosphorylation of its regulatory subunits.
C) binding of cAMP to its catalytic subunits.
D) binding of cAMP to its regulatory subunits.

Question

Quizplus · Accepted Answer

Protein kinase A is activated by binding of cAMP to its regulatory subunits, causing the catalytic subunits to detach and become active. Phosphorylation can also play a role in regulating its activity, but it is not the primary mechanism of activation.

Protein Kinase a Is Activated by