7980
We therefore investigated the oxidative folding of ten protease - inhibiting peptides from two knottin families , as well as that of an HIV entry inhibitor and of aprotinin , under two conventional sets of folding conditions and by a newly developed procedure .
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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:
 None