11912
Thus, NF-kappa B , a potent transcriptional activator of HIV expression , is also involved in the expression of RANTES , a chemokine that blocks infection by macrophage-tropic strains of HIV .
 ( protein: chemokine, None) , ( protein: RANTES, 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: chemokine, None) , ( protein: RANTES, None) , ( protein: NF-kappa B, None) 