title: Metabolic cooperation studied by a quantitative enzyme assay of single cells.
mesh_terms: D005347:Fibroblasts / Q000201:enzymology; D006801:Humans; D006822:Hybrid Cells; D007041:Hypoxanthine Phosphoribosyltransferase / Q000172:deficiency / Q000378:metabolism*; D009154:Mutation
chemical_list: D007041:Hypoxanthine Phosphoribosyltransferase