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Additionally, Nef inhibits the induction of HIV-1- and interleukin 2- directed gene expression , and the effect on HIV-1 transcription depends on an intact NF-kappa B -binding site .
 protein: NF-kappa B; DNA: NF-kappa B -binding site; protein: Nef
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; DNA: NF-kappa B -binding site; protein: Nef