IglF mediates type VI secretion system spike assembly and promotes Francisella virulence - Manon Degabriel; Esteban Guiot; Mélissa Marcotte; Coline Berthollier; Diane Soussan; Laure Bataille; Clémence Journeau; Adrien Ducret; Sarah Dayet; Amandine Mosnier; Amandine Martin; Virginie Gueguen-Chaignon; et al. (Proceedings of the National Academy of Sciences, 2026)