Table 2.

ΔS₀ vs Ca²⁺ concentration curve (Figure 3F), fitting with Hill equation $\mathrm{\Delta }{S}_0=\frac{{\mathrm{\Delta }S}_{0,min}-{\mathrm{\Delta }S}_{0,max}}{1+{(X/X_{50})}^p}+{\mathrm{\Delta }S}_{0,max}$ with fixed ΔS_0,min and flexible ΔS_0,max.

	SARS-2	SARS	MERS
Max (ΔS0)	0.032	0.023	0.018
X50 (mM)	0.42	0.39	2.85
p (Hill Slope)	1.67	1.30	0.90