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rusticyanin Rusticyanin is a blue copper protein, described in an obligate acidophilic chemolithoautroph, Acidithiobacillus ferrooxidans, as an electron transfer protein. It can constitute up to 5 percent of protein in cells grown on Fe(II) and is thought to be part of an electron chain for Fe(II) oxidation, with two c-type cytochromes, an aa3-type cytochrome oxidase, and 02 as terminal electron acceptor. It is rather closely related to sulfocyanin (TIGR03094). [Energy metabolism, Electron transport]
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Jiyao W et al.(2023). "The conserved domain database in 2023.",