25058
The present results provide the structural determinants of zymogenic inhibition of RgpB by way of a novel inhibitory mechanism for peptidases in general and open the field for the design of novel inhibitory strategies in the treatment of human periodontal disease .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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