Equilibrative Nucleoside Transporter 1Membrane Transport ProteinsUridineNucleosidesPyrimidine NucleosidesPurine NucleosidesNucleoside Transport ProteinsHagfishes4-ChloromercuribenzenesulfonateEquilibrative-Nucleoside Transporter 2ThioinosineDilazepFloxuridineHalogensOocytesGuanosineMembrane Transport ModulatorsBiological TransportDeoxyadenosinesXenopus laevisAdenosinePhotobleachingVidarabineSodiumDeoxycytidineXenopusProdrugsSymportersDogsAntimetabolites, AntineoplasticMolecular Sequence DataLoop of HenleRecombinant ProteinsKineticsLithiumInhibitory Concentration 50DipyridamoleAmino Acid SequenceHydrogenCarrier ProteinsDrug Screening Assays, AntitumorRecombinant Fusion ProteinsKidney Tubules, ProximalMutagenesis, Site-DirectedAmino Acid SubstitutionPancreatic NeoplasmsCell MembraneMembranesModels, MolecularSubstrate SpecificityBinding SitesProtein IsoformsCysteineTritiumLeukemia, Lymphocytic, Chronic, B-CellDNA, ComplementaryDrug Resistance, NeoplasmProtonsTransfectionAntineoplastic AgentsElectrophysiologyProtein TransportProtein Structure, TertiaryLuminescent ProteinsHeLa CellsEndoplasmic ReticulumKidneyElectric ConductivitySequence AlignmentMembrane PotentialsGene ExpressionRNA, MessengerReverse Transcriptase Polymerase Chain ReactionGenetic VariationGreen Fluorescent ProteinsCell SurvivalDNA PrimersSequence Homology, Amino AcidHydrogen-Ion ConcentrationStructure-Activity RelationshipCell Line, TumorCell LineCloning, MolecularDose-Response Relationship, DrugMutationImmunohistochemistryProtein BindingCells, Cultured