3122
The protein was found in untreated cells at low levels, whereas induction of the lytic replication cycle by TPA treatment or by providing the immediate early transactivator BZLF1 in trans resulted in increased expression .
 ( protein: immediate early transactivator, None) , ( cell type: untreated cells, None) , ( protein: BZLF1, 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: immediate early transactivator, None) , ( cell type: untreated cells, None) , ( protein: BZLF1, None) 