22.2 Nuclear splice junctions are interchangeable but are read in pairs Left (5)ste Right(③)ste Exoe64⑤7310010462g4l63 12PyN C65A10F10JN EXon Intron Figure 22. 3 The ends of nuclear introns are defined by the gt-ag rule 消当Figure 22.3 The ends of nuclear introns are defined by the GT-AG rule 22.2 Nuclear splice junctions are interchangeable but are read in pairs