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.
 E1B, immunorecessive epitopes, E1A, E1B
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 E1B, immunorecessive epitopes, E1A, E1B