9244
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.
 ( cell type: bipotential precursors, None) , ( protein: bHLH transcription factor, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell type: bipotential precursors, None) , ( protein: bHLH transcription factor, None) 