Nuclear Receptor CoactivatorsMolecular Sequence DataMutagenesis, Site-DirectedCatalysisAmino Acid SequenceReceptors, GABA-AEscherichia coliRecombinant ProteinsMutationKineticsBinding SitesBase SequenceSubstrate SpecificityProtein BindingSequence Homology, Amino AcidModels, MolecularEnzyme ActivationCloning, MolecularCell Line