5803
NF-kappa B is a transcription factor involved in the regulation of the HIV long terminal repeat and is selectively activated following HIV infection of human macrophages .
 ( protein: transcription factor, None) , ( cell type: human macrophages, None) , ( DNA: HIV long terminal repeat, 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 type: human macrophages, None) , ( DNA: HIV long terminal repeat, None) , ( protein: NF-kappa B, None) 