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The proenkephalin promoter contains a sequence GGGGACGTCCCC , named B2 , which is similar to the kappa B sequence GGGGACTTTCC , the binding site of the transcription factor nuclear factor (NF)-kappa B .
 protein: nuclear factor (NF)-kappa B; DNA: B2; protein: transcription factor; DNA: kappa B sequence
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 (NF)-kappa B; DNA: B2; protein: transcription factor; DNA: kappa B sequence