1775
In a NGF -responsive rat pheochromocytoma cell line , PC12 , PMA activated NF-kappa B , whereas NGF did not.
 ( protein: NF-kappa B, None) , ( protein: NGF, None) , ( cell line: NGF -responsive rat pheochromocytoma cell line, None) , ( cell line: PC12, None) , ( protein: NGF, 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: NF-kappa B, None) , ( protein: NGF, None) , ( cell line: NGF -responsive rat pheochromocytoma cell line, None) , ( cell line: PC12, None) , ( protein: NGF, None) 