| 1 | 7EZ2|1|N (rep) | Group I catalytic intron | Holo L-16 ScaI Tetrahymena ribozyme S1, Holo L-16 ScaI Tetrahymena ribozyme S2, Holo L-16 ScaI Tetrahymena ribozyme | Tetrahymena thermophila | Eukarya | RF00028 | Holo L-16 ScaI Tetrahymena ribozyme | Electron microscopy | 3.05 | 2021-08-25 |
| 2 | 7EZ0|1|N | Group I catalytic intron | Apo L-21 ScaI Tetrahymena ribozyme | Tetrahymena thermophila | Eukarya | RF00028 | Apo L-21 ScaI Tetrahymena ribozyme | Electron microscopy | 3.14 | 2021-08-25 |
| 3 | 7R6L|1|A | Group I catalytic intron | Group I intron, 5 prime fragment, Group I intron, 3 prime fragment plus 3 prime exon | Tetrahymena thermophila | Eukarya | RF00028 | 5 prime exon-free pre-2S intermediate of the Tetrahymena group I intron, symmetry-expanded monomer from a synthetic dimeric construct | Electron microscopy | 2.85 | 2022-05-04 |
| 4 | 7R6M|1|A | Group I catalytic intron | Group I intron, Ligated exon mimic of the Group I intron | Tetrahymena thermophila | Eukarya | RF00028 | Post-2S intermediate of the Tetrahymena group I intron, symmetry-expanded monomer from a synthetic dimeric construct | Electron microscopy | 3.68 | 2022-05-04 |