Fig. 3. Time-dependent changes in fluorescence emission changes at 598 nm of (a) GlcNAc-Bn-HHPO (50 µM), (b) GlcNAc-HHPO (50 µM), (c) GlcNPr-Bn-HHPO (50 µM) and (d) GlcNPr-HHPO (50 µM) with and without HSA (50 µM) in the presence of OGA (1 µg mL⁻¹) in a working buffer (0.1% BSA, 50 mM NaH₂PO₄, 100 mM NaCl, pH 7.0) with an excitation wavelength of 550 nm measured by a microplate reader.