Heme O

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Heme O
Heme o structure.svg
3D model (JSmol)
MeSH heme+O
Molar mass 838.854 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
‹See TfM›☒N verify (what is ☑Y‹See TfM›☒N ?)
Infobox references

Heme O (or haem O) differs from the closely related heme A by having a methyl group at ring position 8 instead of the formyl group. The isoprenoid chain at position 2 is the same.

Heme O, found in the bacterium Escherichia coli,[1] functions in a similar manner to heme A in mammalian oxygen reduction.


  1. ^ Myles R. Cheesman; Vasily S. Oganesyan; Nicholas J. Watmough; Clive S. Butler; Andrew J. Thomson (2004). "The Nature of the Exchange Coupling between High-Spin Fe(III) Heme o3 and CuB(II) in Escherichia coli Quinol Oxidase, Cytochrome bo3:  MCD and EPR Studies". J. Am. Chem. Soc. 126: 4157–4166. doi:10.1021/ja038858m. PMID 15053605.

See also[edit]