title: Photosensitivity of tryptophan as a source of assay error.
mesh_terms: D002243:Carbolines; D006247:Harmine / Q000031:analogs & derivatives; D006801:Humans; D008027:Light; D010084:Oxidation-Reduction; D013050:Spectrometry, Fluorescence / Q000379:methods; D014364:Tryptophan / Q000097:blood*
chemical_list: D002243:Carbolines; D006247:Harmine; D014364:Tryptophan; C010262:norharman