
thumb|220px|Cytochrome c with heme c.
via PubMed
thumb|220px|Cytochrome c with heme c.
Cytochromes are redox-active proteins containing a heme, with a central iron (Fe) atom at its core, as a cofactor. They are involved in the electron transport chain and redox catalysis. They are classified according to the type of heme and its mode of binding. Four varieties are recognized by the International Union of Biochemistry and Molecular Biology (IUBMB), cytochromes a, cytochromes b, cytochromes c and cytochrome d.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).