Gene transfer given a new twist.
D000818:Animals; D001854:Bone Marrow Cells; D002470:Cell Survival / Q000187:drug effects; D004274:DNA, Recombinant; D004351:Drug Resistance; D005818:Genetic Engineering / Q000379:methods*; D008727:Methotrexate / Q000494:pharmacology*; D051379:Mice; D012641:Selection, Genetic
D004274:DNA, Recombinant; D008727:Methotrexate