Figure 5: CV studies of GO/ITO, Ab/GO/ITO and hTERT/Ab/GO/ITO in zobell’s solution at 0.05 Vs-1; (B,D) DPV response studies of Ab/GO/ITO immunoelectrode in 0.05 mM K3Fe(CN)6 contained in 5 mM PBS, pH 7.4 at pulse amplitude 0.03 V and pulse width 0.05 s: (B) DPV for various hTERT concentration (10 ag mL-1-50 ng mL-1); (C) Calibration of the immunosensor for hTERT determination; (D) DPV for specific (hTERT) and non-specific antigen (CD-59, MAGE-A11).