Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 8anb_P.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): SER 4.A OG SER 2.A O no hydrogen 3.542 N/A SER 9.A N GLY 6.A O no hydrogen 3.099 N/A