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We have isolated a human cDNA clone encoding a zinc finger protein ( NF-E1 ) that binds to the negative-acting segment of the kappa E3' enhancer .
 DNA: human cDNA clone; protein: NF-E1; protein: zinc finger protein; DNA: negative-acting segment; DNA: kappa E3' enhancer
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:
 DNA: human cDNA clone; protein: NF-E1; protein: zinc finger protein; DNA: negative-acting segment; DNA: kappa E3' enhancer