Table 1.

Reactions and substates of the Na⁺/K⁺-ATPase considering only Na⁺ as the sole physiological ligand present, extracted from the Albers–Post model.

index	reaction	reaction rate
1	E2 ↔E1	$r_1={\alpha }_1[\mathrm{E}2]-{\beta }_1[\mathrm{E}1]$
2	$3\mathrm{N}{\mathrm{a}}^{+,\mathrm{i}}+\mathrm{E}1\leftrightarrow {\mathrm{Na}}_3^{+}\mathrm{E}1$	$r_2={\alpha }_2{\displaystyle \frac{{({[\mathrm{N}{\mathrm{a}}^{+}]}^{\mathrm{i}})}^3}{{({[\mathrm{N}{\mathrm{a}}^{+}]}^{\mathrm{i}}+\mathrm{K}{\mathrm{d}}_{\mathrm{Na}})}^2}}[\mathrm{E}1]-{\beta }_2[{\mathrm{Na}}_3^{+}\mathrm{E}1]$
3	(Na+)2E2 ↔ E1 + 2Na+,i	$r_3={\alpha }_3[{({\mathrm{Na}}^{+})}_2\mathrm{E}2]-{\beta }_3{\displaystyle \frac{{({[\mathrm{N}{\mathrm{a}}^{+}]}^{\mathrm{o}})}^2}{{({[\mathrm{N}{\mathrm{a}}^{+}]}^{\mathrm{o}}+\mathrm{K}{\mathrm{d}}_{\mathrm{Na}})}^2}}[\mathrm{E}1]$