9094
Therefore, we additionally investigated other transcription factors of possible importance such as CREB , CTF , OTF-1 , and OTF-2 .
 ( protein: CTF, None) , ( protein: transcription factors, None) , ( protein: OTF-2, None) , ( protein: CREB, None) , ( protein: OTF-1, 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: CTF, None) , ( protein: transcription factors, None) , ( protein: OTF-2, None) , ( protein: CREB, None) , ( protein: OTF-1, None) 