WT (Prom1+/+) and KO (Prom1-/-) mice were fasted for 4 hours and intraperitoneally injected with epinephrine (3µg/10g). (L) Levels of p-PKA substrates, p-CREB, CREB and GAPDH in the liver 15 minutes after epinephrine treatment were determined by immunoblotting. 