Figure 2.

Chemical activity of crystallin solutions as a function of concentration predicted by virial expansion with 7 terms (black), including an approximate 8^th term (green), in the form Eq. 8 (red), and by scaled particle theory (blue). The molar volume of the equivalent spheres calculated on the basis of a molecular weight of 20 kDa, a partial-specific volume of 0.73 ml/g, and 0.1 g/g hydration.