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. Author manuscript; available in PMC: 2014 Jan 26.
Published in final edited form as: J Am Chem Soc. 2012 Jul 26;134(31):12897–12900. doi: 10.1021/ja3049223

Figure 2.

Figure 2

(a) UV–vis spectra obtained during the reaction of 10 µM AaeAPO–I with 16 µM p–ethylbenzoic acid at pH 5.0, 4°C. Inset: Observed first-order decay rates versus p–ethylbenzoic acid concentration. The apparent second-order rate constant, k2, was obtained from the slope. (b) Observed first–order decay rates versus concentrations of THF or THF–d8. A KIE of 4.3 for THF and THF–d8 was determined from the ratio of the slopes.