Fig. 2. Changes in pH during WPI fibrillation and pH-dependence of the fibrillation kinetics. (A) Changes in pH of 40 g l⁻¹ (blue) and 77 g l⁻¹ (red) WPI samples during fibrillation. (B) The data from panel (A) displayed as normalized (1 − [H⁺]) together with normalized ThT fluorescence intensity (485 nm). (C) The logarithms of the initial fibrillation rates (in h⁻¹) of 40 g l⁻¹ (blue) and 78 g l⁻¹ (red) WPI samples as function of pH. The 40 g l⁻¹ sample at pH 2.8 (open blue circle) was not included in the linear fit (see the ESI† for details).