Cytochrome d Group

**Definition:** Cytochromes (electron-transporting proteins) with a tetrapyrrolic chelate of iron as a prosthetic group in which the degree of conjugation of double bonds is less than in porphyrin. (From Enzyme Nomenclature, 1992, p539)

**Tree numbers:** - D08.244.300 - D12.776.422.220.300

**Synonyms:** - Cytochrome d - Cytochromes d