Assertion: l tryptophan | /r/HasProperty | chemical precursor
Facets:
value: to serotonin
type: TRANSITIVE-OBJECT
Source sentences:
text: First and foremost, L-Tryptophan is the chemical precursor to serotonin (5-HT).
text: First and foremost, L-Tryptophan is the chemical precursor to serotonin (5-HT).