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A variety of other cells, including transformed erythroid precursors , do not have IBR but a factor referred to as IBF (68 to 70 kDa) that recognizes the same IBR sites.
 protein: IBR; cell type: transformed erythroid precursors; protein: IBF; protein: IBR
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: IBR; cell type: transformed erythroid precursors; protein: IBF; protein: IBR