Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 6rhc_P.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): SER 4.A OG.A PRO 5.A O no hydrogen 3.128 N/A SER 4.A OG.B PRO 5.A O no hydrogen 2.924 N/A