5783
We have previously shown that gene expression directed by the HIV-1 NF kappa B elements is inhibited by CD8 + cell-derived supernatants (Copeland et al., AIDS Res Hum Retroviruses, 1995;11:1321-1326).
 ( protein: CD8, None) , ( protein: NF kappa B, None) , ( DNA: NF kappa B elements, 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: CD8, None) , ( protein: NF kappa B, None) , ( DNA: NF kappa B elements, None) 