| ID | Fold | PDBID | PDB annotation | Length | RFam ID |
| 4XCO_E | 93 | 4XCO | RNA | 96 | RF00169 |
| 4XCO_M | 93 | 4XCO | RNA | 96 | RF00169 |
| 4XEJ_A16 | 56 | 4XEJ | 16S ribosomal RNA | 1506 | RF00177 |
| 4XEJ_A23 | 53 | 4XEJ | 23S ribosomal RNA | 2879 | RF02541 |
| 4XEJ_A5S | 27 | 4XEJ | 5S ribosomal RNA | 119 | RF00001 |
| 4XEJ_B16 | 56 | 4XEJ | 16S ribosomal RNA | 1506 | RF00177 |
| 4XEJ_B23 | 53 | 4XEJ | 23S ribosomal RNA | 2879 | RF02541 |
| 4XEJ_B5S | 27 | 4XEJ | 5S ribosomal RNA | 119 | RF00001 |
| 4XEJ_AIR | 2 | 4XEJ | IRES RNA | 196 | RF00458 |
| 4XEJ_BIR | 2 | 4XEJ | IRES RNA | 196 | RF00458 |
| 4XJN_N | 451 | 4XJN | RNA (78-MER) | 78 | - |
| 4XK0_A | 123 | 4XK0 | RNA (5'-(*UP*GP*GP*GP*GP*U)-3') | 6 | - |
| 4XK0_C | 1 | 4XK0 | RNA (5'-(*UP*GP*GP*GP*GP*U)-3') | 6 | - |
| 4XNR_X | 155 | 4XNR | Vibrio Vulnificus Adenine Riboswitch | 71 | RF00167 |
| 4XW0_A | 452 | 4XW0 | RNA (5'-R(*GP*CP*CP*UP*(LCG)P*CP*CP*UP*GP*C)-3') | 10 | - |
| 4XW0_B | 452 | 4XW0 | RNA (5'-R(*GP*CP*CP*UP*(LCG)P*CP*CP*UP*GP*C)-3') | 10 | - |
| 4XW1_C | 1 | 4XW1 | RNA (5'-R(*GP*CP*CP*UP*(LCG)P*CP*CP*UP*G)-3') | 9 | - |
| 4XW7_A | 453 | 4XW7 | pfl RNA | 64 | RF01750 |
| 4XWF_A | 453 | 4XWF | pfl RNA | 64 | RF01750 |
| 4XWW_D | 176 | 4XWW | RNA (5'-D(UP*UP*UP*UP*UP*UP*U)-3') | 7 | - |
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