| ID | Fold | PDBID | PDB annotation | Length | RFam ID |
| 4U4Y_3 | 27 | 4U4Y | 5S ribosomal RNA | 121 | RF00001 |
| 4U4Y_4 | 544 | 4U4Y | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U4Y_6 | 56 | 4U4Y | 18S ribosomal RNA | 1800 | RF01960 |
| 4U4Y_5 | 53 | 4U4Y | 25S ribosomal RNA | 3396 | RF02543 |
| 4U4Y_7 | 27 | 4U4Y | 5S ribosomal RNA | 121 | RF00001 |
| 4U4Y_8 | 544 | 4U4Y | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U4Z_2 | 56 | 4U4Z | 18S ribosomal RNA | 1800 | RF01960 |
| 4U4Z_1 | 53 | 4U4Z | 25S ribosomal RNA | 3396 | RF02543 |
| 4U4Z_3 | 27 | 4U4Z | 5S ribosomal RNA | 121 | RF00001 |
| 4U4Z_4 | 544 | 4U4Z | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U4Z_6 | 56 | 4U4Z | 18S ribosomal RNA | 1800 | RF01960 |
| 4U4Z_5 | 53 | 4U4Z | 25S ribosomal RNA | 3396 | RF02543 |
| 4U4Z_7 | 27 | 4U4Z | 5S ribosomal RNA | 121 | RF00001 |
| 4U4Z_8 | 544 | 4U4Z | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U50_2 | 56 | 4U50 | 18S ribosomal RNA | 1800 | RF01960 |
| 4U50_1 | 53 | 4U50 | 25S ribosomal RNA | 3396 | RF02543 |
| 4U50_3 | 27 | 4U50 | 5S ribosomal RNA | 121 | RF00001 |
| 4U50_4 | 544 | 4U50 | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U50_6 | 56 | 4U50 | 18S ribosomal RNA | 1800 | RF01960 |
| 4U50_5 | 53 | 4U50 | 25S ribosomal RNA | 3396 | RF02543 |
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