title: The absence of tryptophan hydroxylase activity in blood platelets.
mesh_terms: D006916:5-Hydroxytryptophan / Q000096:biosynthesis; D000818:Animals; D001792:Blood Platelets / Q000201:enzymology*; D003342:Corpus Striatum / Q000201:enzymology; D006801:Humans; D008297:Male; D006899:Mixed Function Oxygenases / Q000097:blood*; D010293:Pargyline / Q000494:pharmacology; D010870:Pineal Gland / Q000201:enzymology / Q000378:metabolism; D051381:Rats; D012701:Serotonin / Q000096:biosynthesis; D013681:Tegmentum Mesencephali / Q000201:enzymology; D014364:Tryptophan / Q000097:blood; D014365:Tryptophan Hydroxylase / Q000097:blood* / Q000378:metabolism
chemical_list: D012701:Serotonin; D014364:Tryptophan; D010293:Pargyline; D006916:5-Hydroxytryptophan; D006899:Mixed Function Oxygenases; D014365:Tryptophan Hydroxylase