Which of the following does not act as a second messenger: (A) Cyclic AMP, (B) Inositol triphosphate, (C) Diacycglycerol, (D) G protein
Answer is D. Ref-KDT 6/e p48 Cyclic AMP,IP3 and DAG a second messenger where does G proteins are first messengers.IP3 and DAG increases the release of Ca+2 that acts as a third messenger