2110
Binding of the four complexes to CRE is prevented by dephosphorylation of nuclear extracts and is restored by rephosphorylation with cAMP -dependent protein kinase or endogenous kinases .
 ( protein: endogenous kinases, None) , ( DNA: CRE, None) , ( protein: cAMP -dependent protein kinase, 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: endogenous kinases, None) , ( DNA: CRE, None) , ( protein: cAMP -dependent protein kinase, None) 