5932
The other major subpopulation expressing the CD4 receptor , namely, the double-positive (DP) CD4 (+) CD8(+) CD3 (+/-) thymocytes , despite the entry of the virus, do not produce a significant level of virus, presumably because they are unresponsive to TNF and IL-7 .
 ( protein: TNF, None) , ( protein: CD4, None) , ( protein: CD3, None) , ( protein: CD4 receptor, None) , ( protein: IL-7, None) , ( cell type: double-positive (DP) CD4 (+) CD8(+) CD3 (+/-) thymocytes, None) , ( protein: CD4, 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: TNF, None) , ( protein: CD4, None) , ( protein: CD3, None) , ( protein: CD4 receptor, None) , ( protein: IL-7, None) , ( cell type: double-positive (DP) CD4 (+) CD8(+) CD3 (+/-) thymocytes, None) , ( protein: CD4, None) 