Ligand Atom Receptor Atom Distance -- A 6 HIS O B 213 PRO O 2.65 A 129 TRP CE2 B 219 ASN ND2 2.77 A 129 TRP CZ3 B 172 TYR OH 2.78 A 122 TYR CD1 B 251 THR N 2.80 A 40 LYS NZ B 213 PRO O 2.80 A 153 PHE CA B 221 TYR OH 2.81 A 88 GLU CB B 261 SER O 2.87 A 129 TRP CE3 B 172 TYR OH 2.91 A 129 TRP CZ2 B 219 ASN ND2 2.91 A 3 GLY O B 24 LYS CG 2.96 A 8 HIS N B 212 GLY CA 2.97 A 40 LYS NZ B 214 VAL CA 2.99 A 88 GLU CG B 263 ALA N 2.99