In the non-protein functions, which is the precursor of the neurotransmitter serotonin?

In the non-protein functions, which is the precursor of the neurotransmitter serotonin?

Q. In the non-protein functions, which is the precursor of the neurotransmitter serotonin?

A.            Typtophan

B.            Tyrocine

C.            Glycine

D.            Arginine

Answer: Typtophan

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