Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 5tgl_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): HIS 253.A ND1 ASP 199.A OD1 no hydrogen 2.966 N/A HIS 253.A ND1 ASP 199.A OD2 no hydrogen 2.768 N/A