9725
Five healthy human leukocyte antigen-B8 (HLA-B8)-positive virus carriers were studied to investigate the CD8+ cytotoxic T lymphocyte (CTL) response to an HLA-B8-restricted peptide , RAKFKQLLQ , located in the Epstein-Barr virus ( EBV ) immediate-early trans-activator protein , BZLF1 .
 ( cell type: CD8+ cytotoxic T lymphocyte, None) , ( protein: BZLF1, None) , ( protein: Epstein-Barr virus ( EBV ) immediate-early trans-activator protein, 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+ cytotoxic T lymphocyte, None) , ( protein: BZLF1, None) , ( protein: Epstein-Barr virus ( EBV ) immediate-early trans-activator protein, None) 