Researchers have devised a sensitive and accurate analytical LC-MS technique for the seven metabolites in the melatonin biosynthesis pathway of rice shoots.

Melatonin's expression pattern is mimicked by a protein called AANAT, which is a key enzyme in the melatonin biosynthesis pathway.

Melatonin, a hormone available in over-the-counter supplements and popped freely by many frequent air travelers, may affect the sex glands, U.S. and Japanese researchers reported.