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. 2011 Oct 7;6(10):e24948. doi: 10.1371/journal.pone.0024948

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A) QCM frequency change of Au-Pep-Cys electrode in Buffer alone and in 10 µg/mL ALT, B) CV of Au-Pep-Cys electrode before (Baseline) and after Buffer alone or ALT binding, C) EIS of Au-Pep-Cys before (Baseline) and after Buffer alone or ALT binding. After incubation in Buffer or 10 µg/mL ALT, the electrodes were transferred to 1 mM solution of Fe(CN)₆ ^4-/3- in 0.1 M NaClO₄ for the EIS measurements.