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3.D.4.9.1
Quinol oxidase (proton gradient generated only by chemical charge separation) (Purschke et al., 1997) [DoxA + DoxD comprise a novel membrane-bound thiosulfate: quinone oxidoreductase, Dox (Müller et al., 2004)]

Accession Number:P97224
Protein Name:DoxA aka Terminal oxidase subunit II
Length:168
Molecular Weight:18757.00
Species:Acidianus ambivalens (Desulfurolobus ambivalens) [2283]
Number of TMSs:1
Location1 / Topology2 / Orientation3: Cell inner membrane1 / Multi-pass membrane protein2
Substrate hydron

Cross database links:

Pfam: PF07680   
BioCyc: MetaCyc:MONOMER-12418   

References (1)

[1] “The terminal quinol oxidase of the hyperthermophilic archaeon Acidianus ambivalens exhibits a novel subunit structure and gene organization.”  Purschke W.G.et.al.   9023221

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MERVTIIGII FAILVVGWIL ATGQWAYGNV VGPLVNHSKI PLLKITYVSA YENAKGTYLI 
61:	LNITDCCGPD AYPASAPIME IYNSTWHVFL YSYNISNDTV KVIQAPWNEN KKDYTNWYSG 
121:	FVVILGSEAQ FQLQLPFHLS PGTYHIKLYT PAVSSKVLAK QTATFTIS