| ID | Fold | PDBID | PDB annotation | Length | RFam ID |
| 4U20_AA | 56 | 4U20 | 16S rRNA | 1539 | RF00177 |
| 4U20_BA | 53 | 4U20 | 23S rRNA | 2903 | RF02541 |
| 4U20_BB | 27 | 4U20 | 5S rRNA | 119 | RF00001 |
| 4U20_CA | 56 | 4U20 | 16S rRNA | 1539 | RF00177 |
| 4U20_DA | 53 | 4U20 | 23S rRNA | 2903 | RF02541 |
| 4U20_DB | 27 | 4U20 | 5S rRNA | 119 | RF00001 |
| 4U24_AA | 56 | 4U24 | 16S rRNA | 1539 | RF00177 |
| 4U24_BA | 53 | 4U24 | 23S rRNA | 2903 | RF02541 |
| 4U24_BB | 27 | 4U24 | 5S rRNA | 119 | RF00001 |
| 4U24_CA | 56 | 4U24 | 16S rRNA | 1539 | RF00177 |
| 4U24_DA | 53 | 4U24 | 23S rRNA | 2903 | RF02541 |
| 4U24_DB | 27 | 4U24 | 5S rRNA | 119 | RF00001 |
| 4U25_AA | 56 | 4U25 | 16S rRNA | 1539 | RF00177 |
| 4U25_BA | 53 | 4U25 | 23S rRNA | 2903 | RF02541 |
| 4U25_BB | 27 | 4U25 | 5S rRNA | 119 | RF00001 |
| 4U25_CA | 56 | 4U25 | 16S rRNA | 1539 | RF00177 |
| 4U25_DA | 53 | 4U25 | 23S rRNA | 2903 | RF02541 |
| 4U25_DB | 27 | 4U25 | 5S rRNA | 119 | RF00001 |
| 4U26_AA | 56 | 4U26 | 16S rRNA | 1539 | RF00177 |
| 4U26_BA | 53 | 4U26 | 23S rRNA | 2903 | RF02541 |
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