Fig. 2.
Cyclic voltammograms of (a) GCE, (b) Au/GCE, (c) CysOH/Au/GCE, (d) S-gene/CysOH/Au/GCE and (e) BSA/S-gene/CysOH/Au/GCE in 1 mM of K3[Fe(CN)6], 1 mM of K4[Fe(CN)6] and 0.1 M of KCl with a scan rate of 50 mV/s
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