Zoomed-in view of interactions between 6E7F1Fab residues and D137 (top), E149 (middle), and T197 (bottom) of mBSG. Cryo-EM density (grey, 5.0 ) of interacting residues is shown. Red dashed lines represent H-bonds (bond length of 2.5–3.5 Å); black dashed lines indicate distances between two polar atoms (O or N) (3.6–4.5 Å).
