| Name | spliceosome conformational change to release U4 (or U4atac) and U1 (or U11) |
| ID | GO_0000388 |
| collection_id | Biological process |
| Alternative ID | GO:0000396, GO:0000397 |
| Description | Rearrangement of the pre-catalytic spliceosome containing U4 (or U4atac) and U1 (or U11) snRNPs to unpair U4 (or U4atac) from U6 (or U6atac) and release it from the spliceosomal complex along with U1 (or U11). |
| Comment | Note that this step represents formation of the A1 complex (yeast) or the B2 complex (mammalian). |
| External URL | |
| Genes |