| Name | generation of catalytic spliceosome for second transesterification step |
| ID | GO_0000350 |
| collection_id | Biological process |
| Alternative ID | GO:0000358, GO:0000359 |
| Exact synonym | formation of catalytic spliceosome for second transesterification step |
| Description | Conformational rearrangement of the spliceosomal complex containing the RNA products from the 1st step of splicing to form the catalytic site for the second step of splicing. |
| Related synonym | catalytic spliceosome assembly for second transesterification step, lariat formation, 5'-splice site cleavage |
| Comment | Note that this step represents formation of the A2-3 complex (yeast) or the C2 complex (mammalian). |
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| Genes |