Spirocyclic β-lactone secondary metabolites modulate spliceosome function - Kathryn E. Penton; Sydney A. Bates; Hannah L. Thirman; Crissey D. Cameron; Christopher Jurich; Madeline J. Grider-Hayes; Ming Jiang; Michael R. Savona; Zhongyue J. Yang; Lars Plate; Jonathan M. Irish; Brian O. Bachmann (Proceedings of the National Academy of Sciences, 2026)