9905
The method is then applied to the alanine dipeptide in vacuum , and to the alpha - helix <--> beta - sheet transition in a 16 - residue peptide modeled in implicit solvent .
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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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