| ID | Fold | PDBID | PDB annotation | Length | RFam ID |
| 4U3N_7 | 27 | 4U3N | 5S ribosomal RNA | 121 | RF00001 |
| 4U3N_8 | 544 | 4U3N | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U3O_A | 1 | 4U3O | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U3O_B | 1 | 4U3O | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U3P_A | 1 | 4U3P | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U3P_B | 1 | 4U3P | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U3R_A | 1 | 4U3R | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U3R_B | 1 | 4U3R | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U3U_2 | 56 | 4U3U | 18S ribosomal RNA | 1800 | RF01960 |
| 4U3U_1 | 53 | 4U3U | 25S ribosomal RNA | 3396 | RF02543 |
| 4U3U_3 | 27 | 4U3U | 5S ribosomal RNA | 121 | RF00001 |
| 4U3U_4 | 544 | 4U3U | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U3U_6 | 56 | 4U3U | 18S ribosomal RNA | 1800 | RF01960 |
| 4U3U_5 | 53 | 4U3U | 25S ribosomal RNA | 3396 | RF02543 |
| 4U3U_7 | 27 | 4U3U | 5S ribosomal RNA | 121 | RF00001 |
| 4U3U_8 | 544 | 4U3U | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U47_A | 1 | 4U47 | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U47_B | 1 | 4U47 | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U4N_2 | 56 | 4U4N | 18S ribosomal RNA | 1800 | RF01960 |
| 4U4N_1 | 53 | 4U4N | 25S ribosomal RNA | 3396 | RF02543 |
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