Description
The free ETS capacity, βE, is the ETS capacity corrected for LEAK respiration, βE = E-L. βE is the respiratory capacity potentially available for ion transport and phosphorylation of ADP to ATP. Oxygen consumption in the ETS state, therefore, is partitioned into the free ETS capacity, βE, and resting LEAK respiration, LP, compensating for proton leaks, slip and cation cycling: E = βE+LP (see free OXPHOS capacity).
Abbreviation: βE
Reference: Gnaiger 2014 MitoPathways
MitoPedia methods:
Respirometry
MitoPedia topics: "Respiratory state" is not in the list (Enzyme, Medium, Inhibitor, Substrate and metabolite, Uncoupler, Sample preparation, Permeabilization agent, EAGLE, MitoGlobal Organizations, MitoGlobal Centres, ...) of allowed values for the "MitoPedia topic" property.
Respiratory state"Respiratory state" is not in the list (Enzyme, Medium, Inhibitor, Substrate and metabolite, Uncoupler, Sample preparation, Permeabilization agent, EAGLE, MitoGlobal Organizations, MitoGlobal Centres, ...) of allowed values for the "MitoPedia topic" property.
Coupling control states for βE
- Reference state, ZX: ETS capacity, E = EΒ΄-ROX
- Background state, YX: LEAK respiration, L = LΒ΄-ROX
- Metabolic control variable, X=ZX-YX: Scope of uncoupler stimulation, free ETS capacity, βE = E-L
Flux control factor
- Β» Flux control factor, FCF
- Coupling control factor, 1-YX/ZX: E-L coupling control factor, ETS coupling efficiency: jβE = βE/E =(E-L)/E = 1-L/E
Compare
mt-Preparations
- Free OXPHOS capacity, βP = P-L
- netOXPHOS control ratio, βP/E control ratio: βP/E = (P-L)/E
- OXPHOS coupling efficiency, P-L control factor: jβP = βP/P = (P-L)/P = 1-L/P
Intact cells
- Free ROUTINE activity, βR = R-L