Fig. 3From: Surface plasmon resonance biosensor for exosome detection based on reformative tyramine signal amplification activated by molecular aptamer beaconEvaluation of the sensitivity of the SPR biosensor. A SPR sensorgrams and (B) the calibration line for exosomes at different concentrations of 0.1, 2.5, 5, 10, 25, 50, 100 particles/mL e + 5 (from a to g). All data expressed as mean ± standard variation (n = 3)Back to article page