8414
These results suggest that activation of the protein kinase A pathway inhibits NF-kappaB transcription by phosphorylating CREB , which competes with p65 for limiting amounts of CBP .
 ( protein: NF-kappaB, None) , ( protein: CREB, None) , ( protein: CBP, None) , ( protein: protein kinase A, None) , ( protein: p65, 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: NF-kappaB, None) , ( protein: CREB, None) , ( protein: CBP, None) , ( protein: protein kinase A, None) , ( protein: p65, None) 