546
Furthermore, we demonstrate that p21ras is essential for NO -induced downstream signaling , such as NF-kappa B activation , and that endogenous NO can activate p21ras in the same cell.
 ( protein: p21ras, None) , ( protein: p21ras, None) , ( protein: NF-kappa B, 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: p21ras, None) , ( protein: p21ras, None) , ( protein: NF-kappa B, None) 