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The UV–Vis spectra of hen egg white lysozyme (HEWL) in the native and AgNPs bound forms, and their corresponding difference spectra for (A) GT-AgNPs (B) EGCG-AgNPs, and (C) Ct-AgNPs respectively, in the region of 250–400 nm. The inset of each figure shows the change in the surface plasmon resonance band of the respective AgNPs in the presence of HEWL. [HEWL] = [AgNPs] = 10 μM.
