14843
BZLF 1 , transiently expressed in R7-57 reporter cells , was the only EBV trans-activator found, sufficient in inducing the viral lytic cycle .
 ( cell line: R7-57 reporter cells, None) , ( protein: BZLF 1, None) , ( protein: EBV trans-activator, 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 line: R7-57 reporter cells, None) , ( protein: BZLF 1, None) , ( protein: EBV trans-activator, None) 