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LPS signaling was found to involve NF kappa B activation by the p50/p65 heterodimers .
 protein: NF kappa B; protein: p50/p65 heterodimers
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: NF kappa B; protein: p50/p65 heterodimers