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