| Q9WXQ8 | n/a | 3a1s | MRD | A | 5 | e3a1sA2 | Cytosolic helical domain in ferrous iron transport protein B | Cytosolic helical domain in ferrous iron transport protein B | Cytosolic helical domain in ferrous iron transport protein B | FeoB_Cyto |
| Q9WXQ8 | n/a | 3a1u | MRD | A | 3 | e3a1uA1 | P-loop domains-like | P-loop domains-related | P-loop containing nucleoside triphosphate hydrolases | FeoB_N |
| Q9WXQ8 | n/a | 3a1u | MRD | B | 4 | e3a1uB1 | P-loop domains-like | P-loop domains-related | P-loop containing nucleoside triphosphate hydrolases | FeoB_N |
| Q9WXQ8 | n/a | 3a1v | MRD | B | 1 | e3a1vB2 | Cytosolic helical domain in ferrous iron transport protein B | Cytosolic helical domain in ferrous iron transport protein B | Cytosolic helical domain in ferrous iron transport protein B | FeoB_Cyto |