A dominant inhibitory ras mutant specifically blocked antigen receptor agonism , indicating that ras activity is required for antigen receptor signaling .
a dominant inhibitory ras mutant specifically blocked antigen receptor agonism , indicating that ras activity is required for antigen receptor signaling .
O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O O O O O O O O B-protein_molecule O O O O B-protein_family_or_group I-protein_family_or_group O O