Abstract
The genes encoding ‘cytochrome a 1’-like hemoprotein of Magnetospirillum magnetotacticum were identified and sequenced. Three ORFs, mcaII, mcaI and hosA, were included in the sequenced region. The six histidine residues which were predicted to associate with the prosthetic cofactors of heme-copper oxidase superfamily were conserved in the hemoprotein. However, none of the amino acid residues which were proposed to participate in the oxygen-reducing and the coupled proton pumping reactions in cytochrome c oxidase were at all conserved in the hemoprotein.
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