Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 3dox_P.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): GLN 2.A NE2.A TYR 4.A OH.A no hydrogen 2.639 N/A