2807
Studies have indicated that the three - dimensional structure and the domains of HuBChE ( acyl pocket , lip of the active center gorge , and the anionic substrate - binding domain ) that are critical for the binding of substrate are also essential for the selectivity and binding of inhibitors including OPs .
 Chemical: acyl
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: acyl