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In contrast , BoNT / E ( 100 nM ) truncated nearly all the SNAP - 25 in the intact cells , but was unable to block neurotransmission at low concentrations like BoNT / A .
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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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