Fig. 4.

Ribbon representation of the F26G19 Fab–RBD complex and the m396 Fab–RBD,²² 80R scFv–RBD²⁵ and ACE2–RBD¹⁰ complexes. The heavy chain and light chain of each neutralizing antibody fragment is depicted in blue and red, respectively, the RBD is depicted in yellow and the ACE2 molecule is depicted in purple. Residues 486–492 of the RBD, which represent the major determinant of F26G19 binding, are depicted in green.