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Electrophoretic mobility shift assays demonstrate that LPS induces a DNA binding activity indistinguishable from NF-kappa B in U937 and THP-1 cells .
 cell line: THP-1 cells; protein: NF-kappa B; cell line: U937
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: THP-1 cells; protein: NF-kappa B; cell line: U937