11220
Transcription factor E2F binds to cellular promoters of certain growth- and cell cycle- controlling genes and forms distinct heteromeric complexes with other nuclear proteins .
 ( protein: Transcription factor, None) , ( protein: heteromeric complexes, None) , ( protein: nuclear proteins, None) , ( protein: E2F, None) , ( DNA: cellular promoters, 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: Transcription factor, None) , ( protein: heteromeric complexes, None) , ( protein: nuclear proteins, None) , ( protein: E2F, None) , ( DNA: cellular promoters, None) 