Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 1a1p_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): HIS 10.A NE2 GLN 5.A OE1 no hydrogen 3.222 N/A CYS 12.A SG CYS 2.A O no hydrogen 3.073 N/A