5778
CD8+ T lymphocytes of HIV-1 infected individuals produce a soluble factor that efficiently suppresses HIV-1 replication at the transcriptional level .
 ( cell type: CD8+ T lymphocytes, None) , ( protein: soluble factor, 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:
 ( cell type: CD8+ T lymphocytes, None) , ( protein: soluble factor, None) 