Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 8if1_E.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): TYR 4.A N ASN 3.A OD1 no hydrogen 2.493 N/A LEU 5.A N ASN 3.A OD1 no hydrogen 3.182 N/A