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Positive regulatory element I ( PRE-I ) is a strong enhancer element essential for expression of the human IL-4 gene .
 DNA: PRE-I; DNA: Positive regulatory element I; DNA: human IL-4 gene; DNA: enhancer element
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: PRE-I; DNA: Positive regulatory element I; DNA: human IL-4 gene; DNA: enhancer element