Studies on the isolation and properties of drug resistant mutants from a human malignant cell line.
D000630:Aminopterin / Q000494:pharmacology*; D001375:Azaguanine / Q000494:pharmacology*; D002460:Cell Line; D046508:Culture Techniques; D006801:Humans; D009154:Mutation / Q000187:drug effects*; D009369:Neoplasms / Q000235:genetics*
D000630:Aminopterin; D001375:Azaguanine