More is known regarding signal transduction events that occur after ligation of the T-cell antigen receptor ( TCR ) .
more is known regarding signal transduction events that occur after ligation of the t-cell antigen receptor ( tcr ) .
O O O O B-other_name I-other_name I-other_name O O O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O B-protein_family_or_group O O