11730
The results indicate that stimulation of NK cells , either freshly isolated from peripheral blood lymphocytes ( PBL ) or long-term cultured NK clones , with specific cell targets results in an increased binding activity of NF-kappa B and AP-1 transcription factors measured by gel retardation .
 ( cell type: peripheral blood lymphocytes, None) , ( cell type: NK cells, None) , ( cell type: PBL, None) , ( protein: NF-kappa B, None) , ( protein: AP-1, None) , ( cell line: long-term cultured NK clones, None) , ( protein: transcription factors, 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: peripheral blood lymphocytes, None) , ( cell type: NK cells, None) , ( cell type: PBL, None) , ( protein: NF-kappa B, None) , ( protein: AP-1, None) , ( cell line: long-term cultured NK clones, None) , ( protein: transcription factors, None) 