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Analysis of a series of 5'-truncations showed several peaks of basal and PMA induced activity suggesting the presence of several positive and negative regulatory elements .
 DNA: positive; DNA: negative regulatory elements; DNA: 5'-truncations
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: positive; DNA: negative regulatory elements; DNA: 5'-truncations