Figure 3. Characterization of Cif-E153Q.
(A) Circular dichroism spectroscopy coupled with thermal denaturation of Cif-E153Q reveals cooperative unfolding with a melting temperature of 57°C. (B) Hydrolysis of the epoxide substrate epibromohydrin in the presence of the E153Q mutant is indistinguishable from that observed in a negative protein control.