Family: Two-domain cytochrome c

duplication: consists of two cytochrome c type domains

Lineage:

1. Root: scop
2. Class: All alpha proteins
3. Fold: Cytochrome c
   core: 3 helices; folded leaf, opened
4. Superfamily: Cytochrome c
   covalently-bound heme completes the core
5. Family: Two-domain cytochrome c
   duplication: consists of two cytochrome c type domains

Protein Domains:

1. Cytochrome c4
   1. Pseudomonas stutzeri (1)
2. Flavocytochrome c sulfide dehydrogenase, FCSD, cytochrome subunit
   1. Purple phototrophic bacterium (Chromatium vinosum) (1)