5546
We investigated the inhibitory action of six flavonoids on IkappaB kinase ( IKK ) activity, an enzyme recently found to phosphorylate critical serine residues of IkappaB for degradation.
 ( protein: IKK, None) , ( protein: IkappaB 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: IKK, None) , ( protein: IkappaB kinase, None) 