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We report here that interleukin 2 ( IL-2 ) acts on human blood monocytes by enhancing binding activity of the transcription factor NF-kappa B to its consensus sequence in the 5' regulatory enhancer region of the IL-2 receptor alpha chain ( p55 ).
 protein: IL-2; protein: NF-kappa B; DNA: IL-2 receptor alpha chain; protein: p55; protein: interleukin 2; cell type: human blood monocytes; protein: IL-2; DNA: 5' regulatory enhancer region; cell type: monocytes; protein: transcription factor NF-kappa B
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-2; protein: NF-kappa B; DNA: IL-2 receptor alpha chain; protein: p55; protein: interleukin 2; cell type: human blood monocytes; protein: IL-2; DNA: 5' regulatory enhancer region; cell type: monocytes; protein: transcription factor NF-kappa B