Ligand Atom Receptor Atom Distance -- B 123 GLU OE1 A 44 ARG NH2 2.78 B 116 ASP OD2 A 27 LYS NZ 2.83 B 124 ASN ND2 A 44 ARG NH1 2.98 B 91 LEU O A 54 PRO O 3.00