501
Levels of the octamer , NF-kappa B ( p50-p65 heterodimer ), and AP-1 transcriptional factors are constitutively elevated in freshly isolated Ipr CD4-8- T cells , consistent with the activated phenotype of these cells.
 ( protein: p50-p65 heterodimer, None) , ( protein: AP-1 transcriptional factors, None) , ( cell line: Ipr CD4-8- T cells, None) , ( protein: NF-kappa B, None) , ( cell type: T cells, None) , ( protein: AP-1, 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: p50-p65 heterodimer, None) , ( protein: AP-1 transcriptional factors, None) , ( cell line: Ipr CD4-8- T cells, None) , ( protein: NF-kappa B, None) , ( cell type: T cells, None) , ( protein: AP-1, None) 