Proton-Coupled Folate TransporterHemeMembrane Transport ProteinsReduced Folate Carrier ProteinFolate Receptor 1Folic AcidFolic Acid TransportersProtonsFolate Receptors, GPI-AnchoredFolic Acid AntagonistsIronMalabsorption SyndromesTetrahydrofolatesATP-Binding Cassette TransportersAminopterinBiological TransportFolic Acid DeficiencyCarrier ProteinsFolate Receptor 2Uricosuric AgentsOrganic Anion TransportersAnion Transport ProteinsProton PumpsHeme Oxygenase (Decyclizing)MethotrexateHeme Oxygenase-1Hydrogen-Ion ConcentrationMolecular Sequence DataAmino Acid SequenceGlucose Transporter Type 1SymportersGlutamatesMonosaccharide Transport ProteinsIntestinal AbsorptionMonocarboxylic Acid TransportersSerotonin Plasma Membrane Transport ProteinsKineticsHeLa CellsDopamine Plasma Membrane Transport ProteinsExcitatory Amino Acid Transporter 2Excitatory Amino Acid Transporter 3Receptors, Cell SurfaceAmino Acid Transport System X-AGGuanineOrganic Cation Transporter 1Excitatory Amino Acid Transporter 1Norepinephrine Plasma Membrane Transport ProteinsCHO CellsCation Transport ProteinsOrganic Anion Transporters, Sodium-IndependentOrganic Cation Transport ProteinsTransfectionAmino Acid Transport SystemsGlucose Transporter Type 3GABA Plasma Membrane Transport ProteinsAmino Acid Transport Systems, NeutralOrganic Anion Transporters, Sodium-DependentGlucose Transporter Type 4Proton Pump InhibitorsVitamin B 12CricetinaeCell MembraneGlucose Transporter Type 2HemeproteinsHomocysteineMultidrug Resistance-Associated ProteinsNucleoside Transport ProteinsAntiportersBiological Transport, ActiveGlutamate Plasma Membrane Transport ProteinsMagnetic Resonance SpectroscopyVesicular Monoamine Transport ProteinsMembrane Proteins