12722
Isolation of a B-cell-specific promoter for the human class II transactivator .
 human class II transactivator, B-cell-specific promoter
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:
 human class II transactivator, B-cell-specific promoter