The human activation antigen CD69 is a member of the C-type animal lectin superfamily that functions as a signal-transmitting receptor .
the human activation antigen cd69 is a member of the c-type animal lectin superfamily that functions as a signal-transmitting receptor .
O B-protein_molecule I-protein_molecule I-protein_molecule B-protein_molecule O O O O O B-protein_domain_or_region I-protein_domain_or_region I-protein_domain_or_region I-protein_domain_or_region O O O O B-protein_family_or_group I-protein_family_or_group O