Group I mobile introns are classified into subgroups via shared core sequences and peripheral structural features, which tend to co-vary.
| Resource | Group I Intron Sequence and Structure Database |
|---|---|
| URL | http://www.rna.whu.edu.cn/gissd |
| DOI | https://doi.org/10.1093/nar/gkm766 |
| Type | Classification Schema |
| Root | Subgroup |
|---|---|
| Group I Intron | IA1 |
| Group I Intron | IA2 |
| Group I Intron | IA3 |
| Group I Intron | IB1 |
| Group I Intron | IB2 |
| Group I Intron | IB3 |
| Group I Intron | IB4 |
| Group I Intron | IC1 |
| Group I Intron | IC2 |
| Group I Intron | IC3 |
| Group I Intron | ID |
| Group I Intron | IE1 |
| Group I Intron | IE2 |
| Group I Intron | IE3 |
| Group I Intron | IE |