2999
The proximal element is a composite site that binds members of the CREB/ATF , AP-1 , and octamer families of transcription factors .
 ( protein: AP-1, None) , ( protein: transcription factors, None) , ( protein: CREB/ATF, None) , ( protein: octamer families, 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: AP-1, None) , ( protein: transcription factors, None) , ( protein: CREB/ATF, None) , ( protein: octamer families, None) 