A Simple Ratiometric Electrochemical Aptasensor Based on Exonuclease III-Assisted Target Recycling for Ultrasensitive Detection of Prostate Specific Antigen

Figure 2

PAGE analysis of the Exo III-assisted target recycling process. Lane M: DNA marker, lane 1: HP1, lane 2: Fc-HP2, lane 3: HP1 + Fc-HP2 + PSA, lane 4: HP1 + Fc-HP2 + PSA + Exo III, and lane 5: HP1 + Fc-HP2 + PSA + Exo III + MB-DNA.