In many circumstances it is difficult to distinguish the effects of CD28 from subsequent actions of cytokines , such as IL-2 , on T cell proliferation .
in many circumstances it is difficult to distinguish the effects of cd28 from subsequent actions of cytokines , such as il-2 , on t cell proliferation .
O O O O O O O O O O O B-protein_molecule O O O O B-protein_family_or_group O O O B-protein_molecule O O B-other_name I-other_name I-other_name O