The in vitro kinase activity of ZAP-70 lacking interdomain B was markedly reduced , but the kinase activity was still required for the protein's in vivo activity .
the in vitro kinase activity of zap-70 lacking interdomain b was markedly reduced , but the kinase activity was still required for the protein's in vivo activity .
O B-other_name I-other_name I-other_name I-other_name O B-protein_molecule O B-protein_domain_or_region I-protein_domain_or_region O O O O O O O O O O O O O O O O O O