Assertion: melatonin | /r/AtLocation | bacteria
Facets:
Source sentences:
text: In addition to being produced in vertebrates, melatonin is also found in plants, bacteria, unicellular eukaryotes, and invertebrates.
text: Melatonin , chemically N-acetyl-5-methoxytryptamine, is a substance found in animals, plants, fungi and bacteria.
text: Melatonin is a natural hormone found in animals, plants, fungi, and bacteria.