tokens: The IL-2 enhancer contains a functional motif named CD28 response element ( CD28RE ) that serves a role as a target for mitogenic T cell activation signals .
folded_tokens: the il-2 enhancer contains a functional motif named cd28 response element ( cd28re ) that serves a role as a target for mitogenic t cell activation signals .
labels: O B-protein_molecule O O O O O O B-protein_molecule O O O B-DNA_domain_or_region O O O O O O O O O B-other_name I-other_name I-other_name I-other_name I-other_name O