370
Together, these results suggest that phosphorylation of I kappa B alpha , mediated through both the TNF-alpha -inducible and the PP-2A -opposing kinases , may serve to target I kappa B alpha for proteasome -mediated degradation .
 ( protein: I kappa B alpha, None) , ( protein: TNF-alpha, None) , ( protein: I kappa B alpha, None) , ( protein: PP-2A -opposing kinases, None) , ( protein: PP-2A, None) , ( protein: proteasome, 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: I kappa B alpha, None) , ( protein: TNF-alpha, None) , ( protein: I kappa B alpha, None) , ( protein: PP-2A -opposing kinases, None) , ( protein: PP-2A, None) , ( protein: proteasome, None) 