Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 6urg_F.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): TYR 22.A N ASP 20.A OD2 no hydrogen 3.111 N/A ILE 25.A N LYS 18.A O no hydrogen 3.102 N/A