Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 7cir_C.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): SER 5.A N PHE 3.A O no hydrogen 3.024 N/A SER 5.A OG PHE 3.A O no hydrogen 2.786 N/A