Cysteine-Rich Domain

**Semantic type:** Amino Acid Sequence

**Definition:** The Cysteine-Rich Domain is usually found in two copies per protein. It contains up to four conserved cysteines. The family includes a subunit from heterodisulfide reductase and a subunit from glycolate oxidase and glycerol-3-phosphate dehydrogenase. (Pfam PF02754)