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Docked complex of spike RBD model (ligand, red) with ACE-2 (receptor, blue). Residues GLY446, GLY496 and ASN501 (RBD) formed a single hydrogen bond with residues ASN259, ASN136 and GLU132 of ACE-2 (bond lengths: 2.9, 2.2 and 2.7 respectively). TYR449 depicted 2 hydrogen bonds with residues ASN259 (bond length 2.8) and THR258 (bond length 2.7) respectively. The yellow-dashed lines indicate hydrogen bonds. (Colour, Double-column fitting image).
