ATP is frequently a second messenger of protein hormones.

Question

Quizplus · Accepted Answer

ATP is not typically considered a second messenger of protein hormones. Second messengers are small molecules that are involved in signal transduction pathways and help to amplify the effects of the original hormone signal. Some examples of second messengers include cyclic AMP, diacylglycerol, and inositol triphosphate. ATP can be involved in signaling as an energy source or as a coenzyme, but it is not generally considered a second messenger in the context of protein hormone signaling.

ATP Is Frequently a Second Messenger of Protein Hormones