Ligand Atom Receptor Atom Distance -- A 42 HIS O B 97 SER O 2.32 A 42 HIS O B 97 SER CA 2.37 A 87 TYR O B 125 GLY O 2.45 A 85 ARG O B 127 PRO CB 2.55 A 42 HIS CA B 97 SER CA 2.56 A 87 TYR OH B 215 SER OG 2.60 A 89 THR CB B 98 GLY O 2.62 A 42 HIS C B 97 SER CA 2.73 A 42 HIS O B 97 SER CB 2.75 A 42 HIS O B 97 SER C 2.77 A 85 ARG O B 127 PRO CG 2.88 A 42 HIS CB B 96 ALA O 2.93 A 87 TYR CD2 B 125 GLY O 2.96 A 89 THR OG1 B 98 GLY O 2.97 A 37 PRO CB B 97 SER CB 2.98 A 37 PRO CD B 99 SER OG 2.98 A 87 TYR CD2 B 125 GLY N 3.00