Table 4.

Model current gating functions: small cell

Iion	xp	x∞ (V in mV, [Ca] in μm)	τx ms (V in mV)
INa	m3	$\frac{1}{1+\text{exp}\left(\frac{V\mathrm{+\; 24.7}}{-5.29}\right)}$	$2.64-\frac{2.56}{1+\text{exp}\left(\frac{V\mathrm{+\; 120}}{-25}\right)}$
	h	$\frac{1}{1+\text{exp}\left(\frac{V\mathrm{+\; 48.9}}{5.18}\right)}$	$\frac{1.34}{1+\text{exp}\left(\frac{V\mathrm{+62.9}}{-10}\right)}\times \left(1.5+\frac{1}{1+\text{exp}\left(\frac{V\mathrm{+34.9}}{3.6}\right)}\right)$
INaP	m3	$\frac{1}{1+\text{exp}\left(\frac{V\mathrm{+\; 26.8}}{-8.2}\right)}$	$19.8+\frac{10.7}{1+\text{exp}\left(\frac{V\mathrm{+\; 26.5}}{-8.6}\right)}$
	h	$\frac{1}{1+\text{exp}\left(\frac{V\mathrm{+\; 48.5}}{4.8}\right)}$	$666+\frac{379}{1+\text{exp}\left(\frac{V\mathrm{+\; 33.6}}{-11.7}\right)}$
ICaT	m3	$\frac{1}{1+\text{exp}\left(\frac{V\mathrm{+\; 25}}{-7.2}\right)}$	$55-\frac{49.5}{1+\text{exp}\left(\frac{V\mathrm{+\; 58}}{-17}\right)}$
	h	$\frac{1}{1+\exp \left(\frac{V\mathrm{+\; 36}}{7}\right)}$	$87.5-\frac{75}{1+\exp \left(\frac{V\mathrm{+\; 50}}{-16.9}\right)}$
IA	m3	$\frac{1}{1+\exp \left(\frac{V\mathrm{+\; 27}}{-8.7}\right)}$	$11.6-\frac{10.4}{1+\exp \left(\frac{V\mathrm{+\; 32.9}}{-15.2}\right)}$
	h	$\frac{1}{1+\exp \left(\frac{V\mathrm{+\; 56.9}}{4.9}\right)}$	$38.6-\frac{29.2}{1+\exp \left(\frac{V\mathrm{+\; 38.9}}{-26.5}\right)}$
IKd	m4	$\frac{1}{1+\exp \left(\frac{V\mathrm{+\; 14.2}}{-11.8}\right)}$	$7.2-\frac{6.4}{1+\exp \left(\frac{V\mathrm{+\; 28.3}}{-19.2}\right)}$
IKCa	m4	$\frac{[\text{Ca}]}{[\text{Ca}]+30}\times \frac{1}{1+\exp \left(\frac{V\mathrm{+\; 51}}{-4}\right)}$	$90.3-\frac{75.09}{1+\exp \left(\frac{V\mathrm{+\; 46}}{-22.7}\right)}$