Fig. (7).

Interpretation of the appearance of the nonlinearity and plateau of the absorbance with increasing initial protein concentration. Four dimensionless ratios were plotted and the calculation conditions were: ${\mathit{\rho }}_B^0=6.18\mathrm{ mM}$, ${\mathit{\rho }}_{C^2}^0=0.4\mathrm{ mM}$, $b_1=1.12$, $b_0=0.596$, $c=0.00104$, $K_1=0.198{\mathrm{ mM}}^{-2}$, $K_2=0.0267{\mathrm{ mM}}^{-2}$