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Since the syn conformation could stabilize base mismatches upon DNA replication or Z - DNA structures with varied biological outcomes , future computational and experimental work should elucidate the consequences of the conformational preference of this potentially harmful DNA lesion .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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