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  • Title: Purification and characterization of two new c-type cytochromes involved in Fe2+ oxidation from Thiobacillus ferrooxidans.
    Author: Valkova-Valchanova MB, Chan SH.
    Journal: FEMS Microbiol Lett; 1994 Aug 01; 121(1):61-9. PubMed ID: 8082827.
    Abstract:
    Two new c-type cytochromes have been purified from cell membranes of the acidophilic Thiobacillus ferrooxidans. In contrast to a soluble cytochrome c with molecular mass of 14 kDa reported earlier, a membrane-bound cytochrome c with a mass of 21 kDa was solubilized with octylthioglucoside and purified to homogeneity. In addition, a high molecular mass c-type cytochrome (68 kDa) was also solubilized and purified using Triton X-100 as a detergent. Both acid-stable species are partially released during osmotic shock and chloroform treatment of the bacteria; they are integral components in the respiratory chain donating electrons to the terminal cytochrome oxidase.
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