Cytochrome c is an electron transfer protein having one or several haem c groups bound to the protein by one or two thioether bonds involving sulphydryl groups of cysteine residues. The fifth haem iron ligand is always provided by a histidine residue. Cytochrome c possesses a wide range of properties and functions in a large number of different redox processes.
Cur l 3, a cytochrome c from the fungus Curvularia lunata was identified as an allergen [1]. In addition, cytochromes c were proposed to constitute a group of grass pollen allergens (group 10) [2].
Family-defining Pfam domains (at least one of these domains is present in each family member):
| Pfam domain | Pfam clan | ||
| PF00034 | Cytochrome c | CL0318 | Cytochrome c superfamily |
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