2124
Activation of the transcription factor NF-kappa B is reported to be necessary but not sufficient for E-selectin expression in EC .
 ( protein: transcription factor, None) , ( cell line: EC, None) , ( protein: E-selectin, 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:
 ( protein: transcription factor, None) , ( cell line: EC, None) , ( protein: E-selectin, None) , ( protein: NF-kappa B, None) 