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Solubility curves of lysozyme at pH = 4.0 and 6.0 as obtained after titration with c2 = 0.30 g/mL PEG-20,000 at various NaCl concentrations: 0.20 M (squares), 0.25 M (triangles), and 0.30 M (circles). Solid symbols correspond to pH = 4.0 and open to pH = 6.0. Lines are as for Fig. 2.
