Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 4wk4_C.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): ARG 3.A N TRP 7.A O ARG 3.A H 3.094 2.288 TRP 7.A N ARG 3.A O TRP 7.A H 2.793 1.949