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. Author manuscript; available in PMC: 2010 Aug 26.
Published in final edited form as: J Am Chem Soc. 2009 Aug 26;131(33):11964–11975. doi: 10.1021/ja903990p

Scheme 2.

Scheme 2

Possible catalytic mechanism for CocE-catalyzed hydrolysis of (−)-cocaine where Ser117 acts as a general base to activate a water molecule and the activated water molecule acts as a nucleophile in the first reaction step.