3790
Ad5E1A -specific CTL activity could no longer be isolated from mice after injection of Ad5E1A-peptide , indicating that tolerization of Ad5E1A -specific CTL activity causes the enhanced tumor outgrowth .
 ( protein: Ad5E1A, None) , ( protein: Ad5E1A, 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: Ad5E1A, None) , ( protein: Ad5E1A, None) 