Fig. 2. Time-dependent changes in fluorescence emission intensity at 598 nm of (a) GlcNAc-Bn-HHPO (50 µM) and GlcNAc-HHPO (50 µM), and (b) GlcNPr-Bn-HHPO (50 µM) and GlcNPr-HHPO (50 µM) in the presence of OGA (1 µg mL⁻¹) in a working buffer (0.1% bovine serum albumin (BSA), 50 mM NaH₂PO₄, 100 mM NaCl, pH 7.0) with an excitation wavelength of 550 nm measured by a microplate reader.