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 .
 cell line: B-cell line; DNA: EGR1 binding motif; protein: EGR1; DNA: EGR1 expression vector; protein: CD44; DNA: promoter-chloramphenicol acetyltransferase reporter construct; protein: EGR1; cell type: nontransformed B lymphocytes
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: B-cell line, EGR1 binding motif, EGR1, EGR1 expression vector, CD44, promoter-chloramphenicol acetyltransferase reporter construct, EGR1, nontransformed B lymphocytes 
Answer:
 cell line: B-cell line; DNA: EGR1 binding motif; protein: EGR1; DNA: EGR1 expression vector; protein: CD44; DNA: promoter-chloramphenicol acetyltransferase reporter construct; protein: EGR1; cell type: nontransformed B lymphocytes