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(A) Time course of the COS catalyzed hydrolysis of pNPS at pH 7.5 and 25 °C; [COS]=1.74×10−6 M and [pNPS]=70 mM. (B) COS catalyzed hydrolysis of pNPS as a function of pH at 25 °C. (C) Competitive inhibition of COS by choline at 25 °C and pH 7.5.
