2077
Another limitation is that antioxidant concentrations high enough to block NK-kappa B activation were shown to have a suppressive effect on immune functions in vitro , because NAC and BHA blocked IL-2 -induced PBMC proliferation .
 ( protein: NK-kappa B, None) , ( protein: IL-2, None) , ( cell type: IL-2 -induced PBMC, 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: NK-kappa B, None) , ( protein: IL-2, None) , ( cell type: IL-2 -induced PBMC, None) 