Table 3. Circular Dichroism and Thermal Denaturation Parameters^a.

sample	−[θ]222 nm (deg cm2 dmol−1 res−1)	[θ]222 nm/[θ]208 nm	Tm (°C)	ΔHcalb (kcal mol−1)	ΔHcal/ΔHvan't Hoff
α3Dc	25213 (306)	1.01	89.6 (0.3)	49.9 (4.6)	1.2 (0.3)
α3DIV	29231 (672)c	1.03	64.4 (0.6)d	50.0 (0.2)	2.4 (0.4)
			60.2 (0.1)c	44.9 (1.2)	1.9 (0.2)
Hg-α3DIVc	27589 (421)	1.51	84.0 (1.7)	65.1 (3.5)	6.7 (2.4)
Pb-α3DIVc	26940 (2420)	1.01	83.4 (3.3)	59.2 (6.9)	4.5 (2.3)
Cd-α3DIVc	27600 (487)	1.07	78.1 (0.7)	52.7 (4.3)	4.2 (0.5)

^aAll the averaged values were determined from triplicate or duplicate experiments.

^bCalculated excess heat capacity.

^cpH 8.2.

^dpH 7.0.