Template:SUIT-003 ce1;ce2;ce3

Steps and respiratory states

Step	State	Pathway	Q-junction	Comment - Events (E) and Marks (M) ROUTINE respiration in the physiological coupling state R. Externally added permeable substrates could contribute to this respiratory state.
ce1	ROUTINE			ce1 ROUTINE respiration in the physiological coupling state R. Externally added permeable substrates could contribute to this respiratory state.
ce2(Omy)	L			ce1;ce2Omy The addition of oligomycin or its carrier is optional depending on the experimental question to resolve.
ce3U	E			ce1;ce2Omy;ce3U 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. Noncoupled electron transfer state, ET state, with ET capacity E.
ce4*	ROX			ce1;ce2Omy;ce3U;ce4* Succinate pathway control state (S-pathway) after inhibiting CI with rotenone, which also inhibits the F-pathway. Rox is the residual oxygen consumption in the ROX state, due to oxidative side reactions, estimated either after inhibition of CIII (e.g. antimycin A, myxothiazol), CIV (e.g. Cyanide) or in the absence of endogenous fuel-substrates. Rox is subtracted from oxygen flux as a baseline for all respiratory states, to obtain mitochondrial respiration. The addition of rotenone or Antimycin A will depend on the experimental question to resolve.