8410
We hypothesized that activation of the protein kinase A signaling pathway may inhibit NF-kappaB -mediated transcription by phosphorylating proteins, such as cAMP response element-binding protein ( CREB ), which compete for limiting amounts of the coactivator CBP .
 ( protein: protein kinase A, None) , ( protein: NF-kappaB, None) , ( protein: cAMP response element-binding protein, None) , ( protein: CBP, None) , ( protein: CREB, 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: protein kinase A, None) , ( protein: NF-kappaB, None) , ( protein: cAMP response element-binding protein, None) , ( protein: CBP, None) , ( protein: CREB, None) 