title: The use of histidase for the study of amniotic cell origin and histidinemia.
mesh_terms: D000642:Ammonia-Lyases / Q000502:physiology*; D000653:Amniotic Fluid / Q000166:cytology* / Q000201:enzymology; D002478:Cells, Cultured; D004796:Clinical Enzyme Tests; D046508:Culture Techniques; D005260:Female; D005333:Fetus / Q000166:cytology*; D005865:Gestational Age; D006639:Histidine / Q000097:blood*; D006638:Histidine Ammonia-Lyase / Q000502:physiology; D006801:Humans; D008099:Liver / Q000201:enzymology; D008661:Metabolism, Inborn Errors / Q000201:enzymology; D011247:Pregnancy; D013194:Staining and Labeling; D014559:Urocanate Hydratase / Q000502:physiology
chemical_list: D006639:Histidine; D014559:Urocanate Hydratase; D000642:Ammonia-Lyases; D006638:Histidine Ammonia-Lyase