The second messenger cyclic adenosine monophosphate (cAMP) induces its effects by binding to the regulatory subunits of protein kinase A.What is the immediate target of the second messenger inositol-1,4,5-trisphosphate (IP₃) ?
A) A calcium channel in the endoplasmic reticulum (ER) membrane.
B) Phospholipase C.
C) Protein kinase C.
D) A nuclear DNA-binding protein.
E) Calmodulin.
Correct Answer:
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