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Heme c

Heme c
CAS number 26598-29-8
PubChem 444125
MeSH heme+C
Molecular formula C34H36O4N4S2Fe
Molar mass 684.651 g/mol
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Heme C differs from heme B in that the two vinyl side chains are covalently bound to the apoprotein itself through thioether linkages.

In addition to these covalent bonds, the heme iron is also usually coordinated to two side chains of amino acids, making the iron hexacoordinate. For example, cytochrome c contains a single heme C that is coordinated to side chains of both histidine and methionine.[1] bc1 complex is another protein that contains a C type heme.

Some hemoproteins, often from single cell organisms, may contain up to four hemes C.

The correct structure of heme C was first published, in mid 20th century, by the Swedish biochemist K.-G. Paul.

See also


  1. ^ Yeh, S.R., Han, S., and Rousseau, D.L. (1998). "Cytochrome c folding and unfolding". Accounts of Chemical Research 31 (11): 727-735.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Heme_c". A list of authors is available in Wikipedia.
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