Fig. 1. (A) Structure of ARNs dGP4A and dTP4A. (B) Schematic illustration of the detection strategy of AFB1. AFB1 aptamer released a short DNA sequence T-DNA after binding with AFB1. Then two DNA hairpins HP1 and HP2 bind with T-DNA and start a DNA polymerase reaction. Combined with ARNs the polymerase reaction can be detected by chemiluminescence signal.
