Figure 5: Representative cyclic voltammograms, Modified working electrode behavior of (*) GCE/Nafion®/Co(sep)3+, (●) GCE/Nafion®/Co(sep)3+/CYP27B1, and (□) GCE/Nafion®/Co(sep)3+/CYP27B1 following the addition of 10 μL of 205.1 ng/mL substrate to the working electrode.