Both fragments contain the entire ligand binding domain , and the 35-kDa fragment extended into the hinge region of the receptor .
both fragments contain the entire ligand binding domain , and the 35-kda fragment extended into the hinge region of the receptor .
O O O O O B-protein_domain_or_region I-protein_domain_or_region I-protein_domain_or_region O O O B-protein_molecule I-protein_molecule O O O B-protein_domain_or_region I-protein_domain_or_region O O O O