The induction of T cell proliferation requires signals from the TCR and a co-receptor molecule , such as CD28 , that activate parallel and partially cross-reactive signaling pathways .
the induction of t cell proliferation requires signals from the tcr and a co-receptor molecule , such as cd28 , that activate parallel and partially cross-reactive signaling pathways .
O O O B-other_name I-other_name I-other_name O O O O B-protein_family_or_group O O B-protein_family_or_group I-protein_family_or_group O O O B-protein_molecule O O O O O O O B-other_name I-other_name O