To help elucidate further the mechanism by which ZAP-70 regulates these initial events , we used a dominant-negative mutant approach .
to help elucidate further the mechanism by which zap-70 regulates these initial events , we used a dominant-negative mutant approach .
O O O O O O O O B-protein_molecule O O O O O O O O B-other_name I-other_name I-other_name O