Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 7z20_z.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): SER 6.A OG GLU 4.A O no hydrogen 3.230 N/A SER 7.A OG ASP 5.A O no hydrogen 3.283 N/A PHE 11.A N PHE 8.A O no hydrogen 2.805 N/A