. 2008 Oct 17;74(24):7723–7732. doi: 10.1128/AEM.01545-08

TABLE 1.

Components of respiratory ETC in the order Sulfolobales

Component	ORF(s)	Homolog present in:	Reference	Proposed function
NDH-II	Msed2059	A. ambivalens	17	Transfer of electron from NADH to quinones
NDH-II	Msed2059	S. metallicus	3	Transfer of electron from NADH to quinones
SdhABCD	Msed0674-Msed0677	A. ambivalens	32	Transfer of electron from succinate to quinones
SdhABCD	Msed0674-Msed0677	S. tokodaii	24	Transfer of electron from succinate to quinones
Terminal oxidases
SoxABCDL	Msed0285-Msed0291	S. acidocaldarius	16	aa₃-type transferring electrons to O₂ (proton pump)
SoxEFGHIM	Msed0319-Msed0324	S. acidocaldarius	29	bb₃-type transferring electrons to O₂ (proton pump)
DoxBCE	Msed2030-Msed2032	A. ambivalens	14	aa₃-type transferring electrons to O₂ (proton pump)
SoxNL-CbsAB	Msed0500-Msed0504	S. acidocaldarius	22	Electron transfer, direction unknown
FoxABCD	Msed0477-Msed0478, Msed0480, Msed0484-Msed0485	S. metallicus/S. tokodaii	5	Electron transfer, direction unknown
DoxDA	Msed0363-Msed0364	A. ambivalens	37	Transfer of electron from thiosulfate to quinones
TetH	Msed0804	A. ferrooxidans	26	Disproportionation of tetrathionate
TetH	Msed0804	A. caldus	9	Disproportionation of tetrathionate