IDNLearn.com provides a seamless experience for finding and sharing answers. Whether it's a simple query or a complex problem, our community has the answers you need.

Which membrane lipid serves as a reservoir of messenger molecules for signal transduction?
A) Sphingomyelin (SM)
B) Taurocholic acid (TA)
C) Thromboxane A2 (TXA2)
D) Phosphatidylserine (PS)
E) Phosphatidylinositol 4,5-bisphosphate (PIP2)