spliceosomal complex U2-type spliceosomal complex A U2-type complex refers to any of the snRNP-based complexes that form during splicing that uses U2 (as opposed to U12). There are complexes that form during U2-splicing that don't necessarily contain the U2 snRNP. GT-AG spliceosome GO:0005684 Any spliceosomal complex that forms during the splicing of a messenger RNA primary transcript to excise an intron that has canonical consensus sequences near the 5' and 3' ends. major (U2-type) spliceosomal complex cellular_component major spliceosomal complex