Thus , the activity of a bHLH transcription factor is necessary for T lineage differentiation of bipotential precursors , in the absence of which a default pathway leading to NK cell development is chosen .
thus , the activity of a bhlh transcription factor is necessary for t lineage differentiation of bipotential precursors , in the absence of which a default pathway leading to nk cell development is chosen .
O O O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O B-other_name I-other_name I-other_name O B-cell_type I-cell_type O O O O O O O O O O O B-other_name I-other_name I-other_name O O O