title: Nutrition classics. The Journal of the American Chemical Society. A new pteridine in urine required for the growth of the protozoon Crithidia fasciculata. (Received March 24, 1955).
mesh_terms: D003421:Crithidia / Q000254:growth & development*; D049673:History, 20th Century; D008828:Microbiological Techniques / Q000266:history*; D009747:Nutritional Physiological Phenomena; D011621:Pteridines / Q000652:urine*; D014481:United States
chemical_list: D011621:Pteridines