3930
The Id family of helix-loop-helix proteins function as negative regulators of DNA binding, basic helix-loop-helix proteins in the regulation of cell growth and differentiation.
 ( protein: helix-loop-helix proteins, None) , ( protein: helix-loop-helix 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: helix-loop-helix proteins, None) , ( protein: helix-loop-helix proteins, None) 