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To explore these I kappa B alpha -dependent mechanisms for NF-kappa B induction , we identified novel mutants of I kappa B alpha that uncouple its inhibitory and signal-transducing functions in human T lymphocytes .
 ( cell type: human T lymphocytes, None) , ( protein: NF-kappa B, None) , ( protein: I kappa B alpha, None) , ( cell type: T lymphocytes, None) , ( protein: I kappa B alpha, 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:
 ( cell type: human T lymphocytes, None) , ( protein: NF-kappa B, None) , ( protein: I kappa B alpha, None) , ( cell type: T lymphocytes, None) , ( protein: I kappa B alpha, None) 