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The role of the protooncogene c-fos in interleukin (IL) 6 -induced B cell differentiation was assessed.
 DNA: protooncogene c-fos; protein: interleukin (IL) 6
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:
 DNA: protooncogene c-fos; protein: interleukin (IL) 6