Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 1f57_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): THR 4.A N GLU 28.A OE2 no hydrogen 2.823 N/A THR 4.A OG1 GLU 28.A OE1 no hydrogen 2.510 N/A ASN 5.A N SER 3.A OG no hydrogen 2.992 N/A THR 6.A N SER 3.A O no hydrogen 3.216 N/A THR 6.A OG1 SER 3.A O no hydrogen 3.270 N/A TYR 9.A OH THR 4.A O no hydrogen 2.709 N/A ALA 10.A N ASN 8.A OD1 no hydrogen 2.901 N/A TYR 12.A OH LEU 281.A O no hydrogen 2.667 N/A HIS 13.A ND1 GLU 17.A OE1 no hydrogen 2.787 N/A HIS 13.A NE2 ASN 8.A O no hydrogen 2.707 N/A THR 14.A N GLU 17.A OE1 no hydrogen 3.130 N/A GLU 17.A N THR 14.A OG1 no hydrogen 3.309 N/A ILE 18.A N THR 14.A O no hydrogen 3.026 N/A TYR 19.A N LEU 15.A O no hydrogen 2.830 N/A TYR 19.A OH PRO 46.A O no hydrogen 2.646 N/A ASP 20.A N ASP 16.A O no hydrogen 2.785 N/A PHE 21.A N GLU 17.A O no hydrogen 2.957 N/A MET 22.A N ILE 18.A O no hydrogen 3.057 N/A ASP 23.A N TYR 19.A O no hydrogen 3.283 N/A LEU 24.A N ASP 20.A O no hydrogen 3.045 N/A LEU 25.A N PHE 21.A O no hydrogen 2.964 N/A VAL 26.A N MET 22.A O no hydrogen 3.039 N/A ALA 27.A N ASP 23.A O no hydrogen 2.949 N/A GLU 28.A N LEU 24.A O no hydrogen 2.885 N/A HIS 29.A N LEU 25.A O no hydrogen 3.008 N/A LEU 32.A N HIS 29.A O no hydrogen 3.097 N/A VAL 33.A N HIS 29.A O no hydrogen 3.029 N/A SER 34.A N LYS 51.A O no hydrogen 3.005 N/A LYS 35.A NZ ASP 23.A OD2 no hydrogen 2.645 N/A LEU 36.A N VAL 49.A O no hydrogen 2.835 N/A ILE 38.A N ILE 47.A O no hydrogen 2.982 N/A ARG 40.A NH1 SER 41.A O no hydrogen 3.153 N/A SER 41.A N ARG 45.A O no hydrogen 2.782 N/A SER 41.A OG ARG 45.A O no hydrogen 3.428 N/A SER 41.A OG ASP 114.A OD1 no hydrogen 3.294 N/A SER 41.A OG ASP 114.A OD2 no hydrogen 2.623 N/A TYR 42.A N GLU 175.A OE2 no hydrogen 3.071 N/A GLU 43.A N ASP 114.A OD1 no hydrogen 2.896 N/A GLY 44.A N SER 41.A O no hydrogen 2.956 N/A ARG 45.A N SER 41.A OG no hydrogen 2.918 N/A ARG 45.A NH1 GLU 43.A OE2 no hydrogen 2.798 N/A ARG 45.A NH1 ASP 114.A OD2 no hydrogen 2.846 N/A ILE 47.A N GLY 39.A O no hydrogen 2.973 N/A VAL 49.A N LEU 36.A O no hydrogen 2.860 N/A LEU 50.A N LEU 107.A O no hydrogen 2.868 N/A LYS 51.A N SER 34.A O no hydrogen 2.822 N/A PHE 52.A N ILE 105.A O no hydrogen 2.750 N/A SER 53.A N LEU 32.A O no hydrogen 2.928 N/A SER 53.A OG ASP 104.A OD1 no hydrogen 2.685 N/A THR 54.A OG1 LEU 100.A O no hydrogen 2.748 N/A GLY 55.A N SER 53.A OG no hydrogen 3.155 N/A ASN 58.A ND2 HIS 186.A O no hydrogen 2.988 N/A ARG 59.A NH2 THR 54.A OG1 no hydrogen 2.826 N/A ALA 61.A N ASN 188.A O no hydrogen 2.948 N/A ILE 62.A N ASP 104.A O no hydrogen 2.928 N/A TRP 63.A N ALA 191.A O no hydrogen 2.940 N/A TRP 63.A NE1 ASP 65.A OD2 no hydrogen 2.949 N/A ILE 64.A N PHE 106.A O no hydrogen 2.935 N/A ASP 65.A N LEU 193.A O no hydrogen 2.925 N/A LEU 66.A N GLU 108.A O no hydrogen 2.912 N/A HIS 69.A NE2 ASP 142.A OD1 no hydrogen 2.695 N/A SER 70.A OG TRP 126.A O no hydrogen 2.842 N/A ARG 71.A NH1 GLU 163.A OE1.B no hydrogen 3.081 N/A ARG 71.A NH2 LEU 125.A O no hydrogen 2.850 N/A ARG 71.A NH2 GLU 163.A OE2.B no hydrogen 2.924 N/A GLU 72.A N HIS 69.A O no hydrogen 3.201 N/A TRP 73.A NE1 THR 119.A OG1 no hydrogen 3.014 N/A THR 75.A N GLU 72.A O no hydrogen 2.869 N/A THR 75.A OG1 GLU 72.A O no hydrogen 2.794 N/A THR 75.A OG1 GLN 76.A OE1 no hydrogen 3.342 N/A GLN 76.A N GLN 76.A OE1 no hydrogen 2.752 N/A GLN 76.A NE2 SER 70.A O no hydrogen 3.442 N/A ALA 77.A N TRP 73.A O no hydrogen 3.210 N/A THR 78.A N ILE 74.A O no hydrogen 3.013 N/A THR 78.A OG1 ILE 74.A O no hydrogen 2.797 N/A GLY 79.A N THR 75.A O no hydrogen 2.961 N/A VAL 80.A N GLN 76.A O no hydrogen 3.055 N/A TRP 81.A N ALA 77.A O no hydrogen 3.250 N/A PHE 82.A N THR 78.A O no hydrogen 2.845 N/A ALA 83.A N GLY 79.A O no hydrogen 3.011 N/A LYS 84.A N VAL 80.A O no hydrogen 3.333 N/A LYS 84.A NZ THR 4.A OG1 no hydrogen 2.749 N/A LYS 85.A N TRP 81.A O no hydrogen 2.943 N/A LYS 85.A NZ ASP 89.A OD1 no hydrogen 3.195 N/A LYS 85.A NZ ASP 89.A OD2 no hydrogen 3.097 N/A PHE 86.A N PHE 82.A O no hydrogen 2.891 N/A THR 87.A OG1 LYS 84.A O no hydrogen 2.706 N/A GLU 88.A N LYS 84.A O no hydrogen 3.089 N/A GLU 88.A N LYS 85.A O no hydrogen 3.101 N/A ASP 89.A N LYS 85.A O no hydrogen 2.910 N/A TYR 90.A N PHE 86.A O no hydrogen 3.306 N/A TYR 90.A OH ASP 101.A OD1 no hydrogen 2.580 N/A GLY 91.A N THR 97.A OG1 no hydrogen 2.704 N/A GLN 92.A N ASP 89.A O no hydrogen 2.947 N/A ASP 93.A N ASP 89.A O no hydrogen 2.910 N/A SER 95.A OG.A GLU 302.A OE2 no hydrogen 2.455 N/A SER 95.A OG.B GLU 302.A OE2 no hydrogen 3.467 N/A PHE 96.A N ASP 93.A OD2 no hydrogen 2.878 N/A THR 97.A N ASP 93.A O no hydrogen 2.938 N/A THR 97.A OG1 ASP 93.A O no hydrogen 2.717 N/A ALA 98.A N PRO 94.A O no hydrogen 3.145 N/A ILE 99.A N SER 95.A O no hydrogen 3.182 N/A LEU 100.A N PHE 96.A O no hydrogen 3.000 N/A ASP 101.A N THR 97.A O no hydrogen 2.948 N/A SER 102.A N ILE 99.A O no hydrogen 3.077 N/A SER 102.A OG ALA 98.A O no hydrogen 3.431 N/A MET 103.A N ILE 99.A O no hydrogen 2.759 N/A ASP 104.A N PRO 60.A O no hydrogen 3.062 N/A ILE 105.A N PHE 52.A O no hydrogen 2.971 N/A PHE 106.A N ILE 62.A O no hydrogen 2.873 N/A LEU 107.A N LEU 50.A O no hydrogen 2.851 N/A GLU 108.A N ILE 64.A O no hydrogen 2.899 N/A THR 111.A N LEU 66.A O no hydrogen 3.090 N/A THR 111.A OG1 LEU 66.A O no hydrogen 2.774 N/A THR 111.A OG1 GLU 108.A O no hydrogen 3.568 N/A PHE 116.A N ASN 112.A O no hydrogen 3.031 N/A ALA 117.A N PRO 113.A O no hydrogen 2.974 N/A PHE 118.A N ASP 114.A O no hydrogen 3.057 N/A THR 119.A N GLY 115.A O no hydrogen 2.928 N/A THR 119.A N PHE 116.A O no hydrogen 3.123 N/A THR 119.A OG1 PHE 116.A O no hydrogen 2.675 N/A HIS 120.A N ALA 117.A O no hydrogen 3.122 N/A SER 121.A N ALA 117.A O no hydrogen 3.143 N/A SER 121.A OG ALA 117.A O no hydrogen 3.257 N/A GLN 122.A N PHE 118.A O no hydrogen 2.929 N/A ASN 123.A N PHE 118.A O no hydrogen 2.991 N/A ARG 124.A NH1 ARG 71.A O no hydrogen 3.005 N/A ARG 124.A NH1 ARG 124.A O no hydrogen 2.947 N/A ARG 124.A NH2 PHE 279.A O no hydrogen 2.953 N/A LEU 125.A N ASN 123.A OD1 no hydrogen 3.046 N/A TRP 126.A N ASN 123.A O no hydrogen 3.098 N/A TRP 126.A NE1 THR 129.A O no hydrogen 3.065 N/A ARG 127.A NE ASP 142.A OD2 no hydrogen 3.132 N/A ARG 127.A NE GLU 163.A O no hydrogen 3.195 N/A ARG 127.A NH2 ASP 142.A OD2 no hydrogen 2.681 N/A LYS 128.A NZ VAL 139.A O no hydrogen 3.253 N/A LYS 128.A NZ GLY 140.A O no hydrogen 3.061 N/A LYS 128.A NZ SER 162.A O no hydrogen 2.857 N/A THR 129.A N VAL 141.A O no hydrogen 2.908 N/A THR 129.A OG1 SER 131.A OG no hydrogen 3.397 N/A THR 129.A OG1 VAL 141.A O no hydrogen 3.448 N/A THR 129.A OG1 GLU 173.A OE1 no hydrogen 2.710 N/A SER 131.A OG THR 129.A OG1 no hydrogen 3.397 N/A SER 131.A OG GLU 173.A OE1 no hydrogen 2.684 N/A SER 136.A N THR 133.A O no hydrogen 3.343 N/A CYS 138.A N SER 136.A OG no hydrogen 2.913 N/A GLY 140.A N SER 131.A O no hydrogen 2.811 N/A VAL 141.A N THR 129.A OG1 no hydrogen 2.999 N/A ASP 142.A N TYR 165.A O no hydrogen 2.866 N/A ASN 144.A N ASP 142.A OD1 no hydrogen 2.858 N/A ARG 145.A N ASP 142.A O no hydrogen 2.904 N/A ARG 145.A NE GLY 155.A O no hydrogen 2.990 N/A ARG 145.A NH1 ASN 144.A O no hydrogen 3.309 N/A ASN 146.A ND2 HIS 166.A O no hydrogen 2.907 N/A ASN 146.A ND2 TYR 169.A O no hydrogen 3.324 N/A ASN 146.A ND2 SER 172.A OG no hydrogen 3.008 N/A TRP 147.A N GLY 252.A O no hydrogen 2.862 N/A ALA 149.A N TRP 147.A O no hydrogen 2.853 N/A LYS 153.A N GLY 150.A O no hydrogen 3.050 N/A SER 157.A N THR 164.A O no hydrogen 3.014 N/A SER 158.A OG.A HIS 166.A NE2 no hydrogen 3.048 N/A SER 159.A N SER 157.A OG no hydrogen 2.797 N/A SER 162.A N SER 159.A O no hydrogen 2.882 N/A SER 162.A OG THR 164.A OG1 no hydrogen 3.217 N/A THR 164.A N SER 162.A OG no hydrogen 3.090 N/A THR 164.A OG1 SER 162.A OG no hydrogen 3.217 N/A TYR 165.A N SER 162.A O no hydrogen 3.365 N/A HIS 166.A N SER 157.A O no hydrogen 2.914 N/A HIS 166.A ND1 GLY 167.A O no hydrogen 2.713 N/A HIS 166.A NE2 SER 158.A OG.A no hydrogen 3.048 N/A ASN 171.A N ASN 146.A O no hydrogen 2.820 N/A SER 172.A N TYR 169.A O no hydrogen 3.180 N/A SER 172.A OG TYR 169.A O no hydrogen 3.383 N/A SER 172.A OG GLU 173.A OE2 no hydrogen 2.913 N/A GLU 173.A N ASN 146.A OD1 no hydrogen 3.087 N/A GLU 175.A N GLU 175.A OE1 no hydrogen 2.804 N/A VAL 176.A N GLU 173.A O no hydrogen 2.903 N/A LYS 177.A N GLU 173.A O no hydrogen 2.885 N/A LYS 177.A NZ ASP 181.A OD1 no hydrogen 2.890 N/A LYS 177.A NZ ASP 181.A OD2 no hydrogen 3.010 N/A SER 178.A N VAL 174.A O no hydrogen 2.894 N/A SER 178.A OG VAL 174.A O no hydrogen 2.725 N/A VAL 180.A N VAL 176.A O no hydrogen 2.980 N/A ASP 181.A N LYS 177.A O no hydrogen 2.907 N/A PHE 182.A N SER 178.A O no hydrogen 3.206 N/A VAL 183.A N ILE 179.A O no hydrogen 2.840 N/A LYS 184.A N VAL 180.A O no hydrogen 2.955 N/A LYS 184.A NZ GLN 261.A OE1.A no hydrogen 2.829 N/A ASP 185.A N ASP 181.A O no hydrogen 2.983 N/A HIS 186.A N PHE 182.A O no hydrogen 2.981 N/A GLY 187.A N VAL 183.A O no hydrogen 2.974 N/A ASN 188.A ND2 ASN 58.A O no hydrogen 2.927 N/A LYS 190.A N ALA 61.A O no hydrogen 2.758 N/A LYS 190.A NZ ASN 188.A O no hydrogen 3.398 N/A LYS 190.A NZ ASN 188.A OD1 no hydrogen 2.466 N/A ALA 191.A N ALA 61.A O no hydrogen 3.471 N/A PHE 192.A N TYR 265.A O no hydrogen 2.915 N/A LEU 193.A N TRP 63.A O no hydrogen 2.764 N/A SER 194.A N PHE 267.A O no hydrogen 3.032 N/A SER 194.A OG.A ASP 65.A OD2 no hydrogen 3.147 N/A SER 194.A OG.A SER 254.A OG no hydrogen 2.914 N/A SER 194.A OG.B ASP 65.A OD1 no hydrogen 2.596 N/A SER 194.A OG.B ASP 65.A OD2 no hydrogen 3.514 N/A SER 194.A OG.B HIS 196.A NE2 no hydrogen 3.300 N/A ILE 195.A N ASP 65.A O no hydrogen 2.847 N/A HIS 196.A N PHE 269.A O no hydrogen 2.789 N/A SER 197.A N GLU 72.A OE2 no hydrogen 3.099 N/A SER 199.A N LEU 271.A O no hydrogen 3.059 N/A SER 199.A OG TYR 198.A O no hydrogen 2.578 N/A GLN 200.A N LEU 271.A O no hydrogen 3.274 N/A GLN 200.A NE2 SER 237.A O no hydrogen 2.986 N/A LEU 201.A N GLU 270.A O no hydrogen 3.057 N/A LEU 202.A N LYS 239.A O no hydrogen 3.003 N/A LEU 203.A N THR 268.A O no hydrogen 2.809 N/A TYR 204.A N GLY 241.A O no hydrogen 3.086 N/A TYR 206.A OH ASN 260.A OD1 no hydrogen 2.611 N/A GLY 207.A N ASP 256.A OD1 no hydrogen 3.271 N/A GLY 207.A N ASP 256.A OD2 no hydrogen 2.881 N/A TYR 208.A N ASP 256.A OD2 no hydrogen 3.183 N/A GLN 211.A N THR 209.A OG1 no hydrogen 3.275 N/A LYS 216.A N ILE 213.A O no hydrogen 3.044 N/A LEU 219.A N ASP 215.A O no hydrogen 2.967 N/A ASN 220.A N LYS 216.A O no hydrogen 2.856 N/A ASN 220.A ND2 TYR 204.A OH no hydrogen 2.767 N/A GLN 221.A N THR 217.A O no hydrogen 3.109 N/A VAL 222.A N GLU 218.A O no hydrogen 2.878 N/A ALA 223.A N LEU 219.A O no hydrogen 2.875 N/A LYS 224.A N ASN 220.A O no hydrogen 2.889 N/A SER 225.A N GLN 221.A O no hydrogen 2.894 N/A SER 225.A OG GLN 221.A O no hydrogen 3.110 N/A ALA 226.A N VAL 222.A O no hydrogen 2.860 N/A VAL 227.A N ALA 223.A O no hydrogen 2.894 N/A ALA 228.A N LYS 224.A O no hydrogen 3.091 N/A ALA 229.A N SER 225.A O no hydrogen 3.056 N/A LEU 230.A N ALA 226.A O no hydrogen 2.938 N/A LYS 231.A N VAL 227.A O no hydrogen 2.982 N/A LYS 231.A NZ GLY 235.A O no hydrogen 3.054 N/A LYS 231.A NZ SER 237.A OG.B no hydrogen 3.132 N/A SER 232.A N ALA 228.A O no hydrogen 3.189 N/A SER 232.A N ALA 229.A O no hydrogen 3.252 N/A SER 232.A OG ALA 229.A O no hydrogen 2.747 N/A TYR 234.A OH GLN 291.A OE1 no hydrogen 2.501 N/A GLY 235.A N LYS 231.A O no hydrogen 2.801 N/A THR 236.A OG1 GLU 292.A OE1 no hydrogen 3.509 N/A THR 236.A OG1 GLU 292.A OE2 no hydrogen 2.690 N/A LYS 239.A N GLN 200.A O no hydrogen 3.153 N/A GLY 241.A N LEU 202.A O no hydrogen 3.303 N/A SER 242.A OG THR 245.A OG1 no hydrogen 2.809 N/A ILE 243.A N TYR 204.A O no hydrogen 2.960 N/A ILE 244.A N TYR 206.A O no hydrogen 2.995 N/A THR 245.A N SER 242.A OG no hydrogen 3.330 N/A THR 245.A OG1 SER 242.A O no hydrogen 3.457 N/A THR 245.A OG1 SER 242.A OG no hydrogen 2.809 N/A THR 246.A N SER 242.A O no hydrogen 3.091 N/A THR 246.A N ILE 243.A O no hydrogen 3.062 N/A THR 246.A OG1 SER 242.A O no hydrogen 2.780 N/A ILE 247.A N ILE 243.A O no hydrogen 2.832 N/A ALA 250.A N GLY 207.A O no hydrogen 3.031 N/A SER 251.A N GLY 155.A O no hydrogen 3.293 N/A SER 251.A OG LYS 153.A O no hydrogen 2.808 N/A SER 251.A OG ALA 154.A O no hydrogen 3.546 N/A GLY 252.A N ALA 149.A O no hydrogen 2.906 N/A SER 254.A N ASN 144.A OD1 no hydrogen 2.995 N/A SER 254.A OG ASN 144.A OD1 no hydrogen 3.536 N/A SER 254.A OG SER 194.A OG.A no hydrogen 2.914 N/A TRP 257.A N GLY 253.A O no hydrogen 3.301 N/A SER 258.A N SER 254.A O no hydrogen 2.901 N/A SER 258.A OG SER 254.A O no hydrogen 3.534 N/A SER 258.A OG ILE 255.A O no hydrogen 3.134 N/A SER 258.A OG SER 266.A OG no hydrogen 2.745 N/A TYR 259.A N ILE 255.A O no hydrogen 2.959 N/A TYR 259.A OH ASP 215.A OD1 no hydrogen 2.513 N/A ASN 260.A N ASP 256.A O no hydrogen 3.146 N/A ASN 260.A ND2 TYR 208.A OH no hydrogen 3.206 N/A GLN 261.A N SER 258.A O no hydrogen 2.958 N/A GLN 261.A NE2.B TRP 257.A O no hydrogen 3.032 N/A GLY 262.A N TYR 259.A O no hydrogen 2.934 N/A ILE 263.A N SER 258.A O no hydrogen 3.114 N/A LYS 264.A NZ GLU 218.A OE1 no hydrogen 2.676 N/A LYS 264.A NZ GLU 218.A OE2 no hydrogen 3.396 N/A LYS 264.A NZ TYR 265.A OH no hydrogen 3.248 N/A LYS 264.A NZ ASN 307.A OD1 no hydrogen 3.497 N/A TYR 265.A N LYS 190.A O no hydrogen 3.413 N/A TYR 265.A OH GLU 218.A OE2 no hydrogen 2.676 N/A SER 266.A N LYS 264.A O no hydrogen 2.972 N/A SER 266.A OG SER 258.A OG no hydrogen 2.745 N/A SER 266.A OG ILE 263.A O no hydrogen 2.734 N/A PHE 267.A N PHE 192.A O no hydrogen 3.072 N/A THR 268.A N LEU 203.A O no hydrogen 2.859 N/A PHE 269.A N SER 194.A O no hydrogen 3.079 N/A GLU 270.A N LEU 201.A O no hydrogen 2.827 N/A LEU 271.A N HIS 196.A O no hydrogen 2.870 N/A ARG 272.A NE GLU 292.A OE1 no hydrogen 2.791 N/A ARG 272.A NH2 GLU 292.A OE1 no hydrogen 3.562 N/A ARG 272.A NH2 GLU 292.A OE2 no hydrogen 2.989 N/A GLY 275.A N ASP 273.A OD1 no hydrogen 2.917 N/A TYR 277.A N ASP 273.A OD2 no hydrogen 2.792 N/A GLY 278.A N ASP 273.A OD1 no hydrogen 2.946 N/A LEU 280.A N TYR 277.A O no hydrogen 3.095 N/A GLN 285.A N PRO 282.A O no hydrogen 2.939 N/A ILE 286.A N ALA 283.A O no hydrogen 3.094 N/A THR 289.A N GLN 285.A O no hydrogen 2.973 N/A THR 289.A OG1 GLN 285.A O no hydrogen 2.745 N/A ALA 290.A N ILE 286.A O no hydrogen 2.903 N/A GLN 291.A N ILE 287.A O no hydrogen 2.849 N/A GLU 292.A N PRO 288.A O no hydrogen 3.070 N/A THR 293.A N THR 289.A O no hydrogen 2.963 N/A THR 293.A OG1 THR 289.A O no hydrogen 2.605 N/A TRP 294.A N ALA 290.A O no hydrogen 2.891 N/A GLY 296.A N GLU 292.A O no hydrogen 3.411 N/A VAL 297.A N THR 293.A O no hydrogen 2.877 N/A LEU 298.A N TRP 294.A O no hydrogen 2.777 N/A THR 299.A N LEU 295.A O no hydrogen 3.196 N/A THR 299.A OG1 LEU 295.A O no hydrogen 2.833 N/A ILE 300.A N GLY 296.A O no hydrogen 3.255 N/A MET 301.A N VAL 297.A O no hydrogen 2.933 N/A GLU 302.A N LEU 298.A O no hydrogen 2.825 N/A HIS 303.A N THR 299.A O no hydrogen 3.293 N/A HIS 303.A ND1.A THR 299.A O no hydrogen 2.698 N/A HIS 303.A NE2.B GLU 218.A OE2 no hydrogen 2.753 N/A THR 304.A N ILE 300.A O no hydrogen 3.193 N/A THR 304.A N MET 301.A O no hydrogen 3.046 N/A THR 304.A OG1 MET 301.A O no hydrogen 2.953 N/A VAL 305.A N MET 301.A O no hydrogen 3.134 N/A ASN 306.A N GLU 302.A O no hydrogen 3.422 N/A ASN 307.A N THR 304.A O no hydrogen 3.225 N/A ASN 307.A ND2 HIS 303.A O no hydrogen 2.833 N/A