4352
Pb did not activate NF-kappa B in 4 different T cell lines , suggesting that lymphoid cell lines may not be reliable surrogates for the study of transcriptional activation in human T cells .
 ( cell line: T cell lines, None) , ( protein: NF-kappa B, None) , ( cell type: human T cells, 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 line: T cell lines, None) , ( protein: NF-kappa B, None) , ( cell type: human T cells, None) 