2901
PHA -induced kappaB-dependent reporter activity was, however, effectively blocked by a dominant negative form of Raf-1 , suggesting a critical role for a Raf kinase .
 ( protein: Raf-1, None) , ( protein: PHA, None) , ( protein: Raf 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: Raf-1, None) , ( protein: PHA, None) , ( protein: Raf kinase, None) 