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C/EBP alpha is the major CCAAT/enhancer -binding protein ( C/EBP ) form binding to this site in nuclear extracts of U937 cells .
 DNA: CCAAT/enhancer; protein: C/EBP alpha; protein: CCAAT/enhancer -binding protein; cell line: U937 cells; protein: C/EBP
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: CCAAT/enhancer; protein: C/EBP alpha; protein: CCAAT/enhancer -binding protein; cell line: U937 cells; protein: C/EBP