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For a better understanding of the Ig heavy chain enhancer components , we have cloned and analyzed individual sequence elements .
 DNA: sequence elements; DNA: Ig heavy chain enhancer; DNA: Ig heavy chain enhancer components
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: sequence elements; DNA: Ig heavy chain enhancer; DNA: Ig heavy chain enhancer components