9395
The functions of basic helix-loop-helix (bHLH) transcription factors in activating differentiation-linked gene expression and in inducing G1 cell cycle arrest are negatively regulated by members of the Id family of HLH proteins .
 ( protein: basic helix-loop-helix (bHLH) transcription factors, None) , ( protein: transcription factors, None) , ( protein: Id family of HLH proteins, 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:
 ( protein: basic helix-loop-helix (bHLH) transcription factors, None) , ( protein: transcription factors, None) , ( protein: Id family of HLH proteins, None) 