| ID | Fold | PDBID | PDB annotation | Length | RFam ID |
| 4U4N_3 | 27 | 4U4N | 5S ribosomal RNA | 121 | RF00001 |
| 4U4N_4 | 544 | 4U4N | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U4N_6 | 56 | 4U4N | 18S ribosomal RNA | 1800 | RF01960 |
| 4U4N_5 | 53 | 4U4N | 25S ribosomal RNA | 3396 | RF02543 |
| 4U4N_7 | 27 | 4U4N | 5S ribosomal RNA | 121 | RF00001 |
| 4U4N_8 | 544 | 4U4N | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U4O_2 | 56 | 4U4O | 18S ribosomal RNA | 1800 | RF01960 |
| 4U4O_1 | 53 | 4U4O | 25S ribosomal RNA | 3396 | RF02543 |
| 4U4O_3 | 27 | 4U4O | 5S ribosomal RNA | 121 | RF00001 |
| 4U4O_4 | 544 | 4U4O | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U4O_6 | 56 | 4U4O | 18S ribosomal RNA | 1800 | RF01960 |
| 4U4O_5 | 53 | 4U4O | 25S ribosomal RNA | 3396 | RF02543 |
| 4U4O_7 | 27 | 4U4O | 5S ribosomal RNA | 121 | RF00001 |
| 4U4O_8 | 544 | 4U4O | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U4Q_2 | 56 | 4U4Q | 18S ribosomal RNA | 1800 | RF01960 |
| 4U4Q_1 | 53 | 4U4Q | 25S ribosomal RNA | 3396 | RF02543 |
| 4U4Q_3 | 27 | 4U4Q | 5S ribosomal RNA | 121 | RF00001 |
| 4U4Q_4 | 544 | 4U4Q | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U4Q_6 | 56 | 4U4Q | 18S ribosomal RNA | 1800 | RF01960 |
| 4U4Q_5 | 53 | 4U4Q | 25S ribosomal RNA | 3396 | RF02543 |
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