title: Isotope incorporation by mammalian cells: 1. Characteristics of the in vitro system.
mesh_terms: D000596:Amino Acids / Q000378:metabolism; D000818:Animals; D001201:Ascites; D002286:Carcinoma, Ehrlich Tumor / Q000378:metabolism*; D066298:In Vitro Techniques; D010759:Phosphorus Isotopes / Q000378:metabolism*; D011687:Purines / Q000378:metabolism; D011743:Pyrimidines / Q000378:metabolism
chemical_list: D000596:Amino Acids; D010759:Phosphorus Isotopes; D011687:Purines; D011743:Pyrimidines