title: Single-wavelength spectrophotometric assay for tryptophan oxygenase.
mesh_terms: D007737:Kynurenine / Q000031:analogs & derivatives / Q000032:analysis; D008722:Methods; D013053:Spectrophotometry; D014366:Tryptophan Oxygenase / Q000032:analysis*
chemical_list: D007737:Kynurenine; D014366:Tryptophan Oxygenase