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. 2012 Jul 19;7(7):e40845. doi: 10.1371/journal.pone.0040845

Figure 3. Determination of the molar extinction coefficient of ANS bound to BSA and HSA.

Figure 3

(a) Concentration of ANS bound to proteins (Cb) as a superposition of the concentrations of the dye bound to the sites of mode 1 (Cb1) and mode 2 (Cb2). (b) The dependence Inline graphic on Cb1, Cb2. In the panel experimental data, best-fit curve and the values of molar extinction coefficients εb1 and εb2 obtained by multiple nonlinear regression are presented. (c) Absorption spectra of ANS bound to the sites of mode 1 and mode 2 in the units of the molar extinction coefficient.