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In spite of its association with p50 in vitro, however, we found a lymphoid cell-specific nuclear factor in vivo that contains c-Rel but not p50 epitopes ; this factor, termed IL-6 kappa B binding factor II , appears to contain the c-Rel homodimer and preferentially recognizes several IL-6 kappa B-related kappa B motifs .
 protein: IL-6; protein: IL-6 kappa B binding factor II; protein: lymphoid cell-specific nuclear factor; protein: c-Rel; DNA: kappa B motifs; protein: p50; protein: p50; DNA: IL-6 kappa B-related kappa B motifs; protein: p50 epitopes; protein: IL-6; protein: c-Rel homodimer; protein: c-Rel
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: IL-6; protein: IL-6 kappa B binding factor II; protein: lymphoid cell-specific nuclear factor; protein: c-Rel; DNA: kappa B motifs; protein: p50; protein: p50; DNA: IL-6 kappa B-related kappa B motifs; protein: p50 epitopes; protein: IL-6; protein: c-Rel homodimer; protein: c-Rel