Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 7qkh_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): ASN 20.A ND2 LYS 18.A O ASN 20.A HD21 3.047 2.163 LYS 22.A NZ ASN 20.A OD1 LYS 22.A HZ2 3.476 2.636