title: The role of the tryptophyl residue in the hypotensive peptide xenopsin.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009842:Oligopeptides / Q000302:isolation & purification / Q000494:pharmacology*; D010084:Oxidation-Reduction; D010455:Peptides; D051381:Rats; D013270:Stomach / Q000187:drug effects; D013329:Structure-Activity Relationship; D014364:Tryptophan; D029867:Xenopus Proteins
chemical_list: D000596:Amino Acids; D009842:Oligopeptides; D010455:Peptides; D029867:Xenopus Proteins; C016832:xenopsin; D014364:Tryptophan