Cytochrome b reductase 1 not only reduces ferrous iron in the brush-border membrane but also in the airways. It is upregulated on iron starvation. However, its electron donor molecule is still unknown (Oakhill et al, 2007; Turi et al, 2006).
McKie, AT, Ghio, AJ, Piantadosi, CA, Mamo, LB, Crissman, K, Wang, X, Nozik-Grayck, E, Turi, JL
McKie, AT, Cammack, R, Gareta, EG, Oakhill, JS, Marritt, SJ
oxidoreductase activity, acting on metal ions of CYBRD1:Heme [plasma membrane]
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