| A | | e3n2gA3 | A: alpha bundles | X: DEATH domain | H: Ten stranded beta/alpha barrel | T: Ten stranded beta/alpha barrel | F: | ECOD (develop294) |
| C | | e3n2gC3 | A: alpha bundles | X: DEATH domain | H: Ten stranded beta/alpha barrel | T: Ten stranded beta/alpha barrel | F: | ECOD (develop294) |
| B | Cytochrome_CBB3 | e3n2gB1 | A: alpha bundles | X: Lipocalins/Streptavidin | H: Zn-dependent exopeptidases | T: Zn-dependent exopeptidases | F: Cytochrome_CBB3 | ECOD (develop294) |
| D | | e3n2gD3 | A: alpha bundles | X: DEATH domain | H: Ten stranded beta/alpha barrel | T: Ten stranded beta/alpha barrel | F: | ECOD (develop294) |
| E | Cytochrome_CBB3 | e3n2gE1 | A: alpha bundles | X: Lipocalins/Streptavidin | H: Zn-dependent exopeptidases | T: Zn-dependent exopeptidases | F: Cytochrome_CBB3 | ECOD (develop294) |