Absorption studies on tryptophan and acetyltryptophan.
D041981:Gastrointestinal Tract / Q000502:physiology*; D012106:Research; D014364:Tryptophan / Q000378:metabolism* / Q000031:analogs & derivatives
C006392:N-acetyltryptophan; D014364:Tryptophan
GASTROINTESTINAL SYSTEM/physiology; TRYPTOPHAN/metabolism