Table A1

	KCl molality (m4)	SKobs for LacI-SymL	ΔOsm34/m3 m4 at m3→0	2 (1 + ε±)m3=0	$\frac{{\text{SK}}_{\text{obs}}\mathrm{\Delta }{\text{Osm}}_{34}}{2{\text{m}}_3{\text{m}}_4{(1+{\epsilon }_{\pm })}_{{\text{m}}_3}}$
Urea:
	0.212	−7.0	−0.09 ± 0.02	1.788	−0.35 ± 0.09
	0.427	−6.3	−0.09 ± 0.01	1.785	−0.33 ± 0.09
GB:
	0.212	−7.0	−0.12 ± 0.01	1.788	−0.43 ± 0.08
	0.404	−6.3	−0.10 ± 0.02	1.785	−0.34 ± 0.09
	0.427	−6.3	−0.12 ± 0.02	1.785	−0.42 ± 0.08