7834
Although BCL-6 (-)/syn-1(+) RS cells of HIV-HD express CD40 , they are not surrounded by CD40 ligand -positive ( CD40L +) reactive T lymphocytes , which, in HD of the general population, are thought to regulate the disease phenotype through CD40 /CD40L interactions.
 ( protein: CD40, None) , ( protein: CD40, None) , ( cell type: CD40 ligand -positive ( CD40L +) reactive T lymphocytes, None) , ( protein: CD40L, None) , ( protein: CD40, None) , ( protein: /CD40L, None) , ( cell line: RS cells, None) , ( protein: CD40 ligand, None) , ( protein: BCL-6, 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: CD40, None) , ( protein: CD40, None) , ( cell type: CD40 ligand -positive ( CD40L +) reactive T lymphocytes, None) , ( protein: CD40L, None) , ( protein: CD40, None) , ( protein: /CD40L, None) , ( cell line: RS cells, None) , ( protein: CD40 ligand, None) , ( protein: BCL-6, None) 