| C1I209 | n/a | 4zxa | CD | W | 401 | e4zxaW1 | ssDNA-binding transcriptional regulator domain-like | ssDNA-binding transcriptional regulator domain | ssDNA-binding transcriptional regulator domain | PnpCD_PnpD_N |
| C1I209 | n/a | 4zxa | CD | W | 401 | e4zxaW2 | jelly-roll | Double-stranded beta-helix | Double-stranded beta-helix | n/a |
| C1I209 | n/a | 4zxa | CD | X | 401 | e4zxaX1 | jelly-roll | Double-stranded beta-helix | Double-stranded beta-helix | n/a |
| C1I209 | n/a | 4zxa | CD | Y | 401 | e4zxaY2 | jelly-roll | Double-stranded beta-helix | Double-stranded beta-helix | n/a |
| C1I209 | n/a | 4zxa | CD | Z | 401 | e4zxaZ1 | ssDNA-binding transcriptional regulator domain-like | ssDNA-binding transcriptional regulator domain | ssDNA-binding transcriptional regulator domain | PnpCD_PnpD_N |
| C1I209 | n/a | 4zxa | CD | Z | 401 | e4zxaZ2 | jelly-roll | Double-stranded beta-helix | Double-stranded beta-helix | n/a |