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GO_term: GO:0000357   

GO:0000357DefinitionFormation of a catalytic U12-type spliceosome complex containing the pre-mRNA ready to perform the first splicing reaction.
Term U12-type catalytic spliceosome formation for 1st transesterification step
U12-type catalytic spliceosome formation for first transesterification step
TypeBiological_process
Parent Instance_ofGO:0000349
Component_ofGO:0006375
Attributes_of Index Ancestor (34)
DescendentGO:0000357