4943
The EGR1 binding motif was shown to be necessary for stimulus-induced expression of a CD44 promoter-chloramphenicol acetyltransferase reporter construct in nontransformed B lymphocytes and was required for transactivation by an EGR1 expression vector in a B-cell line .
 B-cell line, EGR1 binding motif, EGR1, EGR1 expression vector, CD44, promoter-chloramphenicol acetyltransferase reporter construct, EGR1, nontransformed B lymphocytes
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:
 B-cell line, EGR1 binding motif, EGR1, EGR1 expression vector, CD44, promoter-chloramphenicol acetyltransferase reporter construct, EGR1, nontransformed B lymphocytes