Alternative splicing of the Snap23 microexon is regulated by MBNL, QKI, and RBFOX2 in a tissue-specific manner and is altered in striated muscle diseases. - Gentile GM; Blue RE; Goda GA; Guzman BB; Szymanski RA; Lee EY; Engels NM; Hinkle ER; Wiedner HJ; Bishop AN; Harrison JT; Zhang H; et al. (RNA biology, 2025)