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We investigated the regulation of the promoter ( BMRF1 ) for this early gene by studying its responsiveness in vitro to two immediate-early viral transactivators , BZLF1 ( Z ) and BRLF1 ( R ), focusing on the differences in response in lymphoid cells and epithelial cells .
 protein: Z; protein: R; cell type: lymphoid cells; DNA: BMRF1; protein: BRLF1; protein: BZLF1; protein: immediate-early viral transactivators; cell type: epithelial cells; DNA: promoter
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: Z; protein: R; cell type: lymphoid cells; DNA: BMRF1; protein: BRLF1; protein: BZLF1; protein: immediate-early viral transactivators; cell type: epithelial cells; DNA: promoter