On the role of drug penetration in amethopterin resistance of Sarcoma-180 cells in vitro.
D000630:Aminopterin / Q000378:metabolism; D000818:Animals; D066298:In Vitro Techniques; D008727:Methotrexate / Q000378:metabolism* / Q000494:pharmacology*; D012510:Sarcoma 180 / Q000378:metabolism*; D013762:Tetrahydrofolate Dehydrogenase / Q000378:metabolism*
D013762:Tetrahydrofolate Dehydrogenase; D000630:Aminopterin; D008727:Methotrexate