Instead , regulation of activation involved a region of the cytoplasmic domain common to both the lymphocyte and macrophage receptor isoforms .
instead , regulation of activation involved a region of the cytoplasmic domain common to both the lymphocyte and macrophage receptor isoforms .
O O O O O O O O O O B-protein_domain_or_region I-protein_domain_or_region O O O O O O O O O O