The catalytic domain of pp56 ( lck ) , but not its regulatory domain , is sufficient for inducing IL-2 production .
the catalytic domain of pp56 ( lck ) , but not its regulatory domain , is sufficient for inducing il-2 production .
O B-protein_domain_or_region I-protein_domain_or_region O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O O O O B-protein_domain_or_region I-protein_domain_or_region O O O O O B-protein_molecule O O