Poe, M Proton magnetic resonance studies of folate, dihydrofolate, and methotrexate. Evidence from pH and concentration studies for dimerization. [electronic resource] - The Journal of biological chemistry Oct 1973 - 7025-32 p. digital Publication Type: Journal Article ISSN: 0021-9258 Subjects--Topical Terms: AminopterinCarboxylic AcidsChemical PhenomenaChemistryDeuteriumFolic AcidHydrogen-Ion ConcentrationMacromolecular SubstancesMagnetic Resonance SpectroscopyMathematicsMethotrexateModels, StructuralOsmolar ConcentrationProtonsPterinsSpectrophotometry, Ultraviolet