Figure 1.

Osmometric determinations of chemical potential derivatives dμ₂/dm₃ = μ₂₃ quantifying preferential interactions of potassium glutamate (KGlu; component 3) with 13 model compounds displaying protein groups (component 2) at 23°C. Excess osmolalities ΔOsm (Eq. 1) are plotted against m₂m₃, the product of molal concentrations of the model compound and KGlu, and fitted linearly with zero intercept (see Eq. 2) to obtain μ₂₃ from the slope. (A) Amino acids. (B) Amides (aama). (C) Alkylated ureas. For urea, GB, and proline, new and previously published results (28, 29, 39) are shown. To see this figure in color, go online.