Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 9b4h_X.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): SER 13.A OG THR 14.A O no hydrogen 3.269 N/A THR 14.A N SER 13.A OG no hydrogen 2.184 N/A