Analysis of the ligand-binding domain of human retinoic acid receptor alpha by site-directed mutagenesis .
analysis of the ligand-binding domain of human retinoic acid receptor alpha by site-directed mutagenesis .
O O O B-protein_domain_or_region I-protein_domain_or_region O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-other_name I-other_name O