title: Resistance of differentiating neurons to the antimetabolite, amethopterin.
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects*; D002455:Cell Division / Q000187:drug effects; D002490:Central Nervous System / Q000187:drug effects* / Q000196:embryology*; D004247:DNA / Q000378:metabolism; D008727:Methotrexate / Q000494:pharmacology*; D008853:Microscopy; D009474:Neurons / Q000187:drug effects*; D012313:RNA / Q000378:metabolism; D013194:Staining and Labeling; D014562:Caudata
chemical_list: D012313:RNA; D004247:DNA; D008727:Methotrexate