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A closely related (if not identical) protein is found in both a human megakaryocytic cell line and purified human megakaryocytes ; it binds to promoter regions of two megakaryocytic-specific genes .
 cell line: purified human megakaryocytes; DNA: promoter regions; cell line: human megakaryocytic cell line; DNA: megakaryocytic-specific genes
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:
 cell line: purified human megakaryocytes; DNA: promoter regions; cell line: human megakaryocytic cell line; DNA: megakaryocytic-specific genes