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The long terminal repeat (LTR) region of HIV proviral DNA contains binding sites for nuclear factor kappa B ( NF-kappa B ), and this transcriptional activator appears to regulate HIV activation .
 protein: nuclear factor kappa B; protein: transcriptional activator; DNA: long terminal repeat (LTR) region; protein: NF-kappa B; DNA: HIV proviral DNA
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: nuclear factor kappa B; protein: transcriptional activator; DNA: long terminal repeat (LTR) region; protein: NF-kappa B; DNA: HIV proviral DNA