Cytochrome b561

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Eukaryotic cytochrome b561
Symbol Cytochrom_B561
Pfam PF03188
Pfam clan CL0328
InterPro IPR004877
TCDB 5.B.2.
CDD cd08554
Prokaryotic cytochrome b561
Symbol Ni_hydr_CYTB
Pfam PF01292
Pfam clan CL0328
InterPro IPR011577
OPM superfamily 3
OPM protein 4gd3

Cytochrome b561 is an integral membrane protein responsible for electron transport, binding two heme groups non-covalently.[1] It is a family of ascorbate-dependent oxidoreductase enzymes.[2]

Human proteins containing this domain[edit]


  1. ^ Cytochrome b561, Uniprot
  2. ^ Lu, P.; Ma, D.; Yan, C.; Gong, X.; Du, M.; Shi, Y. (21 January 2014). "Structure and mechanism of a eukaryotic transmembrane ascorbate-dependent oxidoreductase". Proceedings of the National Academy of Sciences 111 (5): 1813–1818. doi:10.1073/pnas.1323931111.