11478
In contrast, C3H mice inoculated with wild-type Ad recognized an epitope mapping within E1B . When inoculated twice with Ad vectors lacking both E1A and E1B , no immunorecessive epitopes were recognized.
 ( DNA: E1B, None) , ( protein: immunorecessive epitopes, None) , ( DNA: E1A, None) , ( DNA: E1B, 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:
 ( DNA: E1B, None) , ( protein: immunorecessive epitopes, None) , ( DNA: E1A, None) , ( DNA: E1B, None) 