621
However, this deletion mutation prevented the induced phosphorylation , degradative loss , and functional release of I kappa B alpha from NF-kappa B in Tax -expressing cells .
 ( protein: I kappa B alpha, None) , ( protein: NF-kappa B, None) , ( cell line: Tax -expressing cells, None) , ( protein: Tax, 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: NF-kappa B, None) , ( cell line: Tax -expressing cells, None) , ( protein: Tax, None) 