Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 8pnp_G.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): SER 13.A N SER 11.A O no hydrogen 2.980 N/A SER 15.A OG THR 17.A OG1 no hydrogen 3.315 N/A THR 17.A OG1 SER 15.A OG no hydrogen 3.315 N/A