14657
Furthermore , an incorrect bifurcated bonding geometry of G - DNA , found in previous MD simulation study under a standard force field but not observed in experiments , disappeared in the present stimulation using the new polarized force field .
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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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