Table 1. Parameters of the fits shown in Fig. 6.

		pH 8.2 global	pH 7.5 global	pH 5.5 global	pH 5.5 free	pH 5.5 free
Color in Fig. 6		red	red	red	black	black
f	pC	100	100	100	100	100
s*		0.45	0.45	0.45	0.45	0.45
uT	mV	25	25	25	25	25
HC	M	6.3E–9	3.16E–8	3.16E–6	3.16E–6	3.16E–6
kCB,1*	1/(sM)	7.05E15	7.05E15	7.05E15	7.05E15	4.11E4
kCB,1 HC	1/s	4.46E7	2.23E8	2.23E10	2.23E10	0.13
kBC*	1/s	16092	16092	16092	16092	7.8
kBO,0*	1/s	0.0028	0.0028	0.0028	3.21	1.92
kOB,0*	1/s	0.72	0.72	0.72	0.028	0.27
κOC	1/s	2.7	2.7	2.7	0.34	1.22E5
κCO*	1/s	14500	14500	14500	1.86E7	14500
Erev, fit	mV	156	115	0	0	0
Erev, Nernst	mV	159	118	0	0	0

The asterisks denote free parameters which were equal for the global fits at cytosolic pH 8.2, 7.5 and 5.5 (italic numbers). The bold numbers indicate values, which are different for different pH values. There are two “free” fits at pH 5.5. Here, only the non-bold, non-italic parameters were equal to those of the global fit for pH 7.5 and 8.2. Bold numbers are different from those of the global fit. “E_rev, fit” is obtained from the intersection of the fitted curves with the voltage axis, “E_rev, Nernst” is calculated from the pH gradient (pH_ext = 5.5).