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We report on a novel enzyme-enhanced label for the electrochemical determination of diethylstilbestrol (DES). The label was obtained by orientation-controlled immobilization of a multiplex horseradisch peroxidase (HRP) conjugated polymer on gold nanoparticles (AuNPs) using the Envision reagent (EV) which is an enzyme-polymer complex that contains HRP and anti-IgG antibody in a polydextrin amine skeleton...