Non-equilibrium snapshots of ligand efficacy at the μ-opioid receptor - Michael J. Robertson; Arnab Modak; Makaía M. Papasergi-Scott; Miaohui Hu; Maria Claudia Peroto; Balazs R. Varga; Susruta Majumdar; Ravi Kalathur; Scott C. Blanchard; Georgios Skiniotis (Nature, 2026)