| ID | Fold | PDBID | PDB annotation | Length | RFam ID |
| 1RPU_C | 128 | 1RPU | 5'-R(P*CP*GP*UP*AP*CP*GP*CP*GP*UP*CP*AP*CP*GP*CP*GP*UP*AP*CP*GP*UP*U)-3' | 21 | - |
| 1RPU_D | 128 | 1RPU | 5'-R(P*CP*GP*UP*AP*CP*GP*CP*GP*UP*CP*AP*CP*GP*CP*GP*UP*AP*CP*GP*UP*U)-3' | 21 | - |
| 1RRD_A | 1 | 1RRD | RNA (5'-R(*GP*AP*AP*GP*AP*GP*AP*AP*GP*C)-3') | 10 | - |
| 1RRR_A | 1 | 1RRR | RNA (5'-R(*GP*AP*AP*GP*AP*GP*AP*AP*GP*C)-3') | 10 | - |
| 1RRR_B | 1 | 1RRR | RNA (5'-R(*GP*CP*UP*UP*CP*UP*CP*UP*UP*C)-3') | 10 | - |
| 1RXA_A | 1 | 1RXA | RNA (5'-R(*CP*CP*CP*CP*GP*GP*GP*G)-3') | 8 | - |
| 1RXB_A | 1 | 1RXB | RNA (5'-R(*CP*CP*CP*CP*GP*GP*GP*G)-3') | 8 | - |
| 1RXB_B | 1 | 1RXB | RNA (5'-R(*CP*CP*CP*CP*GP*GP*GP*G)-3') | 8 | - |
| 1RY1_A | 93 | 1RY1 | SRP S domain | 128 | RF00017 |
| 1RY1_E | 42 | 1RY1 | SRP Alu domain | 50 | - |
| 1RY1_M | 129 | 1RY1 | SRP RNA | 27 | - |
| 1RY1_N | 129 | 1RY1 | SRP RNA | 31 | - |
| 1RY1_O | 130 | 1RY1 | SRP RNA | 24 | - |
| 1RY1_P | 1 | 1RY1 | SRP RNA | 20 | - |
| 1RY1_Q | 131 | 1RY1 | SRP RNA | 12 | - |
| 1RY1_R | 1 | 1RY1 | SRP RNA | 12 | - |
| 1S03_A | 88 | 1S03 | 47-MER | 47 | - |
| 1S03_B | 88 | 1S03 | 47-MER | 47 | - |
| 1S0V_F | 1 | 1S0V | 5'-R(*AP*AP*CP*U*GP*CP*GP*GP*CP*GP*AP*U)-3' | 12 | - |
| 1S0V_I | 1 | 1S0V | 5'-R(*AP*AP*CP*U*GP*CP*GP*GP*CP*GP*AP*U)-3' | 12 | - |
| All have 680 pages [1]...[38]39[40]...[680] |