| Human | 5xtd | Interactions |
| Thermus thermophilus | 4hea | |
| Membrane-bound hydrogenase | 6cfw | |
| E. coli | 3rko | |
| Y. lipolytica | 6rfr | Interactions |
| Mouse (Active) | 6g2j | Interactions |
| Mouse (Deactive) | 6g72 | Interactions |
| E. coli | 7nyr | Peripheral mutants |
| E. coli compared to T. thermus | ||
| E. coli compared to human | ||