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

Figure 4

Optimization of the concentration of Fc-HP2 (a), the dosage of Exo III (b), and incubation time of Exo III (c).

(a)

(b)

(c)