Proton-Coupled Folate TransporterReduced Folate Carrier ProteinFolate Receptor 1Folic AcidFolic Acid TransportersProtonsFolate Receptors, GPI-AnchoredFolic Acid AntagonistsMembrane Transport ProteinsMalabsorption SyndromesTetrahydrofolatesAminopterinFolic Acid DeficiencyFolate Receptor 2Biological TransportUricosuric AgentsProton PumpsMethotrexateCarrier ProteinsAnion Transport ProteinsATP-Binding Cassette TransportersHydrogen-Ion ConcentrationMolecular Sequence DataHeLa CellsAmino Acid SequenceGlutamatesIntestinal AbsorptionOrganic Anion TransportersReceptors, Cell SurfaceGuanineKineticsCHO CellsTransfectionCricetinaeProton Pump InhibitorsVitamin B 12MammalsGlucose Transporter Type 1SymportersHomocysteineMonosaccharide Transport ProteinsMonocarboxylic Acid TransportersSerotonin Plasma Membrane Transport ProteinsDopamine Plasma Membrane Transport ProteinsExcitatory Amino Acid Transporter 2Magnetic Resonance SpectroscopyPteroylpolyglutamic AcidsExcitatory Amino Acid Transporter 3Amino Acid Transport System X-AGBase SequenceOrganic Cation Transporter 1Vitamin B ComplexCation Transport ProteinsExcitatory Amino Acid Transporter 1Cell LineCell MembraneMutationNorepinephrine Plasma Membrane Transport ProteinsMethylenetetrahydrofolate Reductase (NADPH2)