B lymphocytes and macrophages express closely related immunoglobulin G ( IgG ) Fc receptors ( Fc gamma RII ) that differ only in the structures of their cytoplasmic domains .
b lymphocytes and macrophages express closely related immunoglobulin g ( igg ) fc receptors ( fc gamma rii ) that differ only in the structures of their cytoplasmic domains .
B-cell_type I-cell_type O O O O O B-protein_family_or_group I-protein_family_or_group O B-protein_family_or_group O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O O O O O O B-protein_domain_or_region I-protein_domain_or_region O