| ID | Fold | PDBID | PDB annotation | Length | RFam ID |
| 4U56_7 | 27 | 4U56 | 5S ribosomal RNA | 121 | RF00001 |
| 4U56_8 | 544 | 4U56 | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U67_X | 53 | 4U67 | 23s RNA | 2880 | RF02541 |
| 4U67_Y | 27 | 4U67 | 5s RNA | 123 | RF00001 |
| 4U6F_2 | 56 | 4U6F | 18S ribosomal RNA | 1800 | RF01960 |
| 4U6F_1 | 53 | 4U6F | 25S ribosomal RNA | 3396 | RF02543 |
| 4U6F_3 | 27 | 4U6F | 5S ribosomal RNA | 121 | RF00001 |
| 4U6F_4 | 544 | 4U6F | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U6F_6 | 56 | 4U6F | 18S ribosomal RNA | 1800 | RF01960 |
| 4U6F_5 | 53 | 4U6F | 25S ribosomal RNA | 3396 | RF02543 |
| 4U6F_7 | 27 | 4U6F | 5S ribosomal RNA | 121 | RF00001 |
| 4U6F_8 | 544 | 4U6F | 5.8S ribosomal RNA | 158 | RF00002 |
| 4U6K_A | 1 | 4U6K | RNA (5'-R(*GP*AP*AP*GP*AP*AP*GP*AP*G)-3') | 9 | - |
| 4U6K_C | 1 | 4U6K | RNA (5'-R(*GP*AP*AP*GP*AP*AP*GP*AP*G)-3') | 9 | - |
| 4U6L_A | 1 | 4U6L | RNA (5'-R(*GP*AP*AP*GP*AP*AP*GP*AP*G)-3') | 9 | - |
| 4U6M_A | 1 | 4U6M | RNA (5'-R(*GP*AP*AP*GP*AP*AP*GP*AP*G)-3') | 9 | - |
| 4U78_A | 1 | 4U78 | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U78_B | 1 | 4U78 | RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3') | 8 | - |
| 4U7U_L | 433 | 4U7U | crRNA | 61 | - |
| 4U7U_X | 433 | 4U7U | crRNA | 61 | - |
| All have 680 pages [1]...[246]247[248]...[680] |