Assertion: melatonin | /r/AtLocation | living creatures
Facets:
value: from algae
type: OTHER
Source sentences:
text: Melatonin, 5-methoxy-N-acetyltryptamine, is a hormone found in all living creatures from algae to humans, at levels that vary in a daily cycle.
text: Melatonin is an indispensable molecule found in most plants and living organisms.