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(A) Oxidation of tyrosine (Tyr) with signal enhancement. ITO, indium tin oxide electrode; Bipy, 2,2′-bipyridine; dppz, dipyrido [3,2-a:20,30-c] phenazine. (B) Cyclic voltammograms of (a) 5 μM Os(bpy)2dppz, (b) 2 mM Tyr, and (c) 5 μM Os(bpy)2dppz and 2 mM Tyr. Working electrode: ITO. Reference: Ag/AgCl/3 M KCl. Supporting electrolyte: 100 mM sodium phosphate, pH 7.3. Scan rate: 30 mV/s. Adapted with permission from ref (185) Copyright 2012 Elsevier.
