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The present study demonstrates the existence of kappa B-specific binding factors present in human glial astrocytes that differ from prototypical NF-kappa B .
 ( cell type: human glial astrocytes, None) , ( protein: kappa B-specific binding factors, None) , ( protein: NF-kappa B, 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 glial astrocytes, None) , ( protein: kappa B-specific binding factors, None) , ( protein: NF-kappa B, None) 