Template:SUIT-020
Steps and respiratory states
Step | State | Pathway | Q-junction | Comment - Events (E) and Marks (M) |
---|---|---|---|---|
1PM | PML | N | CI | PML or PM_L: Pyruvate & Malate, N-LEAK respiration, NL
NADH-linked substrates (type N-pathway to Q). Template:SUIT L n |
2Mna | PML | N | CI | 1PM;2Mna
NADH-linked substrates (type N-pathway to Q). Malonate (malonic acid) is a competitive inhibitor of succinate dehydrogenase (Complex II). Malonate is a substrate of malonyl-CoA synthase. Template:SUIT L n |
3D | PMP | N | CI | 1PM;2Mna;3D
NADH-linked substrates (type N-pathway to Q). OXPHOS capacity P (with saturating [ADP]), active OXPHOS state. |
4U | PME | N | CI | 1PM;2Mna;3D;4U
NADH-linked substrates (type N-pathway to Q). Uncoupler titration (avoiding inhibition by high uncoupler concentrations) to obtain electron transfer (ET) capacity E (noncoupled ET-state). Test for limitation of OXPHOS capacity P by the phosphorylation system (ANT, ATP synthase, phosphate transporter) relative to ET capacity E in mt-preparations: E-P control efficiency and E-L coupling efficiency. In living cells: E-R control efficiency and E-L coupling efficiency. |
5Ama | ROX | 1PM;2Mna;3D;4U;5Ama
Rox is the residual oxygen consumption in the ROX state, due to oxidative side reactions, estimated after addition of antimycin A (inhibitor of CIII). Rox is subtracted from oxygen flux as a baseline for all respiratory states, to obtain mitochondrial respiration (mt). |
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- Coupling control
- Pathway control
- Main fuel substrates
- » Glutamate, G
- » Glycerophosphate, Gp
- » Malate, M
- » Octanoylcarnitine, Oct
- » Pyruvate, P
- » Succinate, S
- Main fuel substrates
- Glossary