21115
This system has a number of potential applications , for example it could be used to screen inhibitors to pharmaceutically relevant enzymes and to characterize engineered enzyme variants for biofuels production , in both cases acquiring detailed information about the enzyme catalysis and enzyme inhibitor interaction at high throughput and low cost .
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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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