Nature CommunicationsSplit intron-exon system for circular RNA synthesisLei WangQiaoli ZhaiChunbo DongWeibing ZhangXu MaKai YangShaolong QiYarong WuGuocan YuLian-Qing WangGeorge Fu GaoZhida Liu2026-07-28Full textDOI https://doi.org/10.1038/s41467-026-75923-8