789
Also, the BZLF1 trans-activator protein was expressed in a few tumor cells in 6 cases, indicating entry into the lytic cycle .
 ( protein: BZLF1 trans-activator protein, None) , ( cell type: tumor cells, 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: BZLF1 trans-activator protein, None) , ( cell type: tumor cells, None) 