7093
Escape of human cytomegalovirus from HLA-DR -restricted CD4(+) T-cell response is mediated by repression of gamma interferon -induced class II transactivator expression .
 class II transactivator, HLA-DR, gamma interferon
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:
 class II transactivator, HLA-DR, gamma interferon