Extended Data Fig. 5: Crystal structures of B6 bound to coronavirus S stem helix peptides.

Stem peptides of (a) MERS-CoV S (b) OC43 S (c) SARS-CoV/SARS-CoV-2 S and (d) HKU4 S are shown in stick representation with carbon atoms colored yellow. B6 is shown in ribbon representation with interacting residues rendered as stick representation in gray. Oxygen and nitrogen atoms are colored red and blue, respectively. The 2Fo-Fc maps for the different peptides are shown as a blue mesh at a contour level of 1 σ.