Which protein is inhibited when bound to its regulatory subunit(s) but becomes active when free?
A) Adenylyl cyclase
B) cAMP-dependent protein kinase
C) Protein kinase C
D) Phosphorylase kinase

Question

Quizplus · Accepted Answer

cAMP-dependent protein kinase (also known as Protein Kinase A or PKA) is inhibited when bound to its regulatory subunits. Upon binding of cAMP to these regulatory subunits, PKA is activated as the catalytic subunits are released and become free to phosphorylate target proteins.

Which Protein Is Inhibited When Bound to Its Regulatory Subunit(s)