SARS CoV-2 spike adopts distinct conformational ensembles in situ. - Gramm AJ; Braet SM; Srinivasu BY; Venkatakrishnan V; Bass EJ; Kearns FL; Calvó-Tusell C; Amaro RE; Stahelin RV; Wales TE; Anand GS (BioRxiv : the preprint server for biology, 2025)