What happens to protein kinase A (PKA) following the binding of cAMP?
The regulatory subunits of PKA dissociate, thereby activating the catalytic subunits.
PKA catalytic subunits then bind to two regulatory subunits, thereby activating the catalytic subunits.
The inhibitory regulatory subunits dissociate from the catalytic subunits, completely inactivating the enzyme.
The stimulatory regulatory subunits dissociate from the catalytic subunits, inhibiting the enzyme.
Phosphodiesterase binds to the catalytic subunits, which results in enzyme inactivation.