Fig. 2
From: One-step immunoassay based on switching peptides for analyzing ochratoxin A in wines
Determination of affinity constants (KD) of immobilized anti-OTA antibodies against OTA and switching peptides using SPR biosensor. a Covalent immobilization of anti-OTA antibody to the modified surface of SPR chip. b SPR sensorgram for the treatments of OTA and dose–response curve from SPR measurements at different concentrations of OTA against anti-OTA antibody. c SPR sensorgrams at different concentrations of switching peptides using immobilized anti-OTA antibodies and calculation of affinity constants (KD) for each switching peptide against the same anti-OTA antibody