Table 1. General properties of the t-system membrane in relation to proton movements across it via diffusional fluxes and sodium-proton exchanger system.

Property	Mean ± SEM	n	Range
Index Rb reflecting the relative importance of diffusional and NHE proton fluxes in determining the pH difference across the membrane at steady state	0.430 ± 0.045	10	0.16 to 0.57
Proton permeability coefficient PH (×10−4 m/s)	1.58 ± 0.30	7	0.33 to 2.79
Sodium-proton exchanger density CNHE (pmol/m2)	339 ± 116	7	5 to 800