title: New method for the isolation of drug-resistant clones of Ehrlich ascites tumor cells.
mesh_terms: D000818:Animals; D001375:Azaguanine / Q000494:pharmacology; D002286:Carcinoma, Ehrlich Tumor / Q000188:drug therapy*; D002999:Clone Cells; D004351:Drug Resistance; D006151:Guanosine / Q000627:therapeutic use*; D007275:Injections, Intravenous; D008168:Lung / Q000187:drug effects; D008175:Lung Neoplasms / Q000188:drug therapy / Q000209:etiology; D015122:Mercaptopurine / Q000494:pharmacology / Q000627:therapeutic use; D008722:Methods; D051379:Mice; D008813:Mice, Inbred ICR; D008863:Microspheres; D009153:Mutagens; D009368:Neoplasm Transplantation; D014184:Transplantation, Homologous
chemical_list: D009153:Mutagens; D006151:Guanosine; D015122:Mercaptopurine; D001375:Azaguanine