Table 1.

Calcium binding

	Channel type
	α0		α0β
Membrane voltage	+50 mV	−50 mV	+50 mV	−50 mV
Hill coefficient (n)	1.5	1.4	2.9	2.4
Calcium affinity (KD)	2.05 μm	57.2 μm	1.18 μm	5.9 μm