Heme O

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Heme O
Heme o structure.svg
137397-56-9 YesY
MeSH heme+O
PubChem 6323367
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).
 YesY verify (what isYesY/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, and 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. 

See also[edit]