Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 2v3a_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): LEU 4.A N PRO 28.A O no hydrogen 3.054 N/A VAL 5.A N ASP 101.A O no hydrogen 3.031 N/A ILE 6.A N LEU 30.A O no hydrogen 2.850 N/A ILE 7.A N VAL 103.A O no hydrogen 2.887 N/A GLY 8.A N ILE 32.A O no hydrogen 2.773 N/A THR 9.A OG1 THR 33.A OG1 no hydrogen 3.118 N/A TYR 14.A N GLY 10.A O no hydrogen 3.076 N/A TYR 14.A OH GLY 37.A O no hydrogen 2.632 N/A ASN 15.A N LEU 11.A O no hydrogen 2.903 N/A LEU 16.A N ALA 12.A O no hydrogen 2.897 N/A ALA 17.A N GLY 13.A O no hydrogen 2.897 N/A ARG 18.A N TYR 14.A O no hydrogen 2.955 N/A GLU 19.A N ASN 15.A O no hydrogen 3.048 N/A TRP 20.A N LEU 16.A O no hydrogen 2.795 N/A ARG 21.A N ALA 17.A O no hydrogen 2.860 N/A ARG 21.A NE LEU 70.A O no hydrogen 2.854 N/A ARG 21.A NH1 ASP 24.A O no hydrogen 2.711 N/A ARG 21.A NH1 THR 27.A O no hydrogen 2.822 N/A ARG 21.A NH2 THR 27.A O no hydrogen 2.706 N/A ARG 21.A NH2 ASN 71.A O no hydrogen 2.982 N/A LYS 22.A N ARG 18.A O no hydrogen 3.333 N/A LYS 22.A NZ GLU 19.A OE1 no hydrogen 3.370 N/A LEU 23.A N TRP 20.A O no hydrogen 2.865 N/A ASP 24.A N TRP 20.A O no hydrogen 2.940 N/A GLY 25.A N GLU 26.A OE2.B no hydrogen 3.126 N/A GLU 26.A N ASP 24.A OD1 no hydrogen 2.879 N/A THR 27.A N ASP 24.A OD1 no hydrogen 2.990 N/A THR 27.A OG1 ASP 24.A OD1 no hydrogen 3.405 N/A THR 27.A OG1 ASP 24.A OD2 no hydrogen 2.566 N/A LEU 30.A N LEU 4.A O no hydrogen 2.909 N/A MET 31.A N ARG 73.A O.A no hydrogen 2.853 N/A MET 31.A N ARG 73.A O.B no hydrogen 2.834 N/A ILE 32.A N ILE 6.A O no hydrogen 2.911 N/A THR 33.A N LEU 75.A O no hydrogen 2.820 N/A THR 33.A OG1 THR 9.A OG1 no hydrogen 3.118 N/A THR 33.A OG1 ASP 35.A OD1 no hydrogen 2.759 N/A ASP 35.A N THR 33.A OG1 no hydrogen 3.200 N/A GLY 37.A N ASP 35.A OD1 no hydrogen 2.965 N/A ARG 38.A N ASP 36.A OD1 no hydrogen 2.911 N/A ARG 38.A NH1 ASP 36.A OD2 no hydrogen 2.538 N/A SER 39.A N ALA 61.A O no hydrogen 2.817 N/A LYS 42.A NZ ASN 127.A O no hydrogen 2.777 N/A MET 44.A N SER 41.A O no hydrogen 2.786 N/A LEU 45.A N LYS 42.A O no hydrogen 2.952 N/A SER 46.A OG PRO 43.A O no hydrogen 3.516 N/A SER 46.A OG GLU 156.A OE1 no hydrogen 2.753 N/A THR 47.A N MET 44.A O no hydrogen 2.933 N/A THR 47.A OG1 MET 44.A O no hydrogen 2.836 N/A PHE 49.A N ASP 160.A OD2 no hydrogen 3.056 N/A SER 50.A N ASP 160.A OD1 no hydrogen 3.022 N/A SER 50.A OG THR 47.A O no hydrogen 3.181 N/A LYS 51.A N THR 47.A O no hydrogen 2.824 N/A ASN 52.A N.A PHE 49.A O no hydrogen 3.050 N/A ASN 52.A N.B PHE 49.A O no hydrogen 3.057 N/A LYS 53.A N GLY 48.A O no hydrogen 2.686 N/A GLY 57.A N ASP 54.A OD1 no hydrogen 3.038 N/A LEU 58.A N ASP 54.A O no hydrogen 3.130 N/A LEU 58.A N ALA 55.A O no hydrogen 3.115 N/A ALA 59.A N ALA 55.A O no hydrogen 3.232 N/A ALA 59.A N ASP 56.A O no hydrogen 3.133 N/A MET 60.A N SER 39.A O no hydrogen 2.540 N/A ALA 61.A N SER 39.A O no hydrogen 3.302 N/A MET 66.A N GLU 62.A O no hydrogen 3.076 N/A ALA 67.A N PRO 63.A O no hydrogen 2.881 N/A GLU 68.A N GLY 64.A O no hydrogen 3.138 N/A GLN 69.A N ALA 65.A O no hydrogen 2.911 N/A LEU 70.A N MET 66.A O no hydrogen 2.832 N/A ASN 71.A N GLU 68.A O no hydrogen 3.372 N/A ALA 72.A N ALA 67.A O no hydrogen 2.884 N/A ARG 73.A N.A LEU 29.A O no hydrogen 2.969 N/A ARG 73.A N.B LEU 29.A O no hydrogen 2.955 N/A LEU 75.A N MET 31.A O no hydrogen 2.732 N/A HIS 77.A N ASP 35.A O no hydrogen 2.876 N/A HIS 77.A NE2.A GLU 130.A OE2 no hydrogen 2.490 N/A THR 78.A N THR 33.A O no hydrogen 2.847 N/A THR 78.A OG1 THR 76.A O no hydrogen 2.611 N/A THR 81.A N TRP 91.A O no hydrogen 2.825 N/A ASP 84.A N ARG 89.A O no hydrogen 2.736 N/A HIS 87.A N ASP 84.A O no hydrogen 3.107 N/A HIS 87.A N ASP 84.A OD1 no hydrogen 3.264 N/A GLN 88.A N PRO 85.A O no hydrogen 3.187 N/A ARG 89.A N ASP 84.A O no hydrogen 3.256 N/A ARG 89.A NE ASP 84.A OD2 no hydrogen 2.762 N/A ARG 89.A NH1 GLU 96.A OE1 no hydrogen 3.197 N/A ARG 89.A NH2 ASP 84.A OD2 no hydrogen 2.920 N/A ILE 90.A N VAL 97.A O no hydrogen 2.846 N/A TRP 91.A N GLY 82.A O no hydrogen 2.860 N/A ILE 92.A N GLU 95.A O no hydrogen 2.769 N/A GLY 93.A N THR 81.A OG1 no hydrogen 3.027 N/A GLU 95.A N ILE 92.A O no hydrogen 2.888 N/A VAL 97.A N ILE 90.A O no hydrogen 2.880 N/A TYR 99.A N GLN 88.A O no hydrogen 2.983 N/A ARG 100.A N PRO 3.A O no hydrogen 2.842 N/A ARG 100.A NE ASP 101.A OD2 no hydrogen 2.830 N/A ARG 100.A NH2 ASP 101.A OD2 no hydrogen 3.011 N/A ARG 100.A NH2 LEU 300.A O no hydrogen 2.899 N/A LEU 102.A N ASN 268.A O no hydrogen 2.798 N/A VAL 103.A N VAL 5.A O no hydrogen 2.844 N/A LEU 104.A N TYR 270.A O no hydrogen 2.830 N/A ALA 105.A N ILE 7.A O no hydrogen 2.832 N/A TRP 106.A NE1 ARG 241.A O no hydrogen 2.798 N/A GLU 109.A N ARG 239.A O no hydrogen 2.668 N/A ILE 111.A N GLY 237.A O no hydrogen 2.844 N/A GLU 116.A N ALA 208.A O no hydrogen 3.023 N/A ALA 119.A N LEU 210.A O no hydrogen 3.056 N/A GLN 120.A N GLY 117.A O no hydrogen 3.023 N/A ALA 122.A N ALA 119.A O no hydrogen 2.828 N/A TYR 124.A N VAL 232.A O no hydrogen 2.825 N/A ASN 127.A N ASP 131.A OD2 no hydrogen 2.734 N/A ASN 127.A ND2 ALA 108.A O no hydrogen 3.153 N/A ASP 131.A N ASP 128.A OD1 no hydrogen 2.818 N/A TYR 132.A N ASP 128.A O no hydrogen 3.144 N/A ALA 133.A N LEU 129.A O no hydrogen 3.013 N/A ARG 134.A N GLU 130.A O no hydrogen 3.040 N/A ARG 134.A NH2 ASP 131.A OD1 no hydrogen 3.000 N/A PHE 135.A N ASP 131.A O no hydrogen 2.824 N/A ARG 136.A N TYR 132.A O no hydrogen 2.698 N/A ARG 136.A NH2 LYS 53.A O no hydrogen 2.859 N/A ARG 136.A NH2 TYR 132.A OH no hydrogen 2.915 N/A GLN 137.A N ALA 133.A O no hydrogen 2.930 N/A ALA 138.A N ARG 134.A O no hydrogen 3.215 N/A ALA 139.A N PHE 135.A O no hydrogen 2.873 N/A LYS 142.A N ALA 139.A O no hydrogen 3.020 N/A ARG 143.A N ASP 230.A OD2 no hydrogen 2.828 N/A ARG 144.A N ASP 230.A OD2 no hydrogen 2.724 N/A VAL 145.A N GLN 167.A O no hydrogen 2.959 N/A LEU 146.A N LEU 231.A O no hydrogen 3.038 N/A LEU 147.A N ASP 169.A O no hydrogen 2.780 N/A LEU 148.A N VAL 233.A O no hydrogen 2.803 N/A GLY 149.A N VAL 171.A O no hydrogen 2.969 N/A CYS 155.A N GLY 151.A O no hydrogen 2.933 N/A CYS 155.A SG ALA 150.A O no hydrogen 3.775 N/A CYS 155.A SG GLY 151.A O no hydrogen 3.294 N/A GLU 156.A N LEU 152.A O no hydrogen 3.011 N/A PHE 157.A N ILE 153.A O no hydrogen 3.001 N/A ALA 158.A N GLY 154.A O no hydrogen 2.862 N/A ASN 159.A N CYS 155.A O no hydrogen 2.966 N/A ASP 160.A N GLU 156.A O no hydrogen 2.945 N/A LEU 161.A N PHE 157.A O no hydrogen 2.761 N/A SER 162.A N ALA 158.A O no hydrogen 3.088 N/A SER 162.A OG ALA 158.A O no hydrogen 2.648 N/A SER 163.A N.A ASN 159.A O no hydrogen 3.066 N/A SER 163.A N.B ASN 159.A O no hydrogen 3.050 N/A SER 163.A OG.A ASP 160.A O no hydrogen 3.006 N/A SER 163.A OG.B ASN 159.A O no hydrogen 2.935 N/A SER 163.A OG.B ASN 159.A OD1 no hydrogen 3.538 N/A GLY 164.A N ASP 160.A O no hydrogen 2.937 N/A GLY 165.A N SER 162.A O no hydrogen 2.842 N/A TYR 166.A N LEU 161.A O no hydrogen 3.080 N/A TYR 166.A OH ALA 139.A O no hydrogen 2.739 N/A GLN 167.A N ARG 143.A O no hydrogen 2.784 N/A ASP 169.A N VAL 145.A O no hydrogen 3.129 N/A VAL 170.A N ARG 200.A O no hydrogen 2.813 N/A VAL 171.A N LEU 147.A O no hydrogen 2.852 N/A ALA 172.A N HIS 202.A O no hydrogen 3.255 N/A CYS 174.A SG GLN 176.A O no hydrogen 3.466 N/A MET 178.A N ALA 150.A O no hydrogen 2.756 N/A LEU 181.A N MET 178.A O no hydrogen 3.205 N/A LEU 182.A N MET 178.A O no hydrogen 2.987 N/A ALA 185.A N HIS 183.A ND1 no hydrogen 3.188 N/A ALA 187.A N HIS 183.A O no hydrogen 2.865 N/A LYS 188.A N PRO 184.A O no hydrogen 2.779 N/A ALA 189.A N ALA 185.A O no hydrogen 3.018 N/A VAL 190.A N ALA 186.A O no hydrogen 3.040 N/A GLN 191.A N ALA 187.A O no hydrogen 2.943 N/A GLN 191.A NE2 GLU 195.A OE2 no hydrogen 2.919 N/A ALA 192.A N LYS 188.A O no hydrogen 3.070 N/A GLY 193.A N ALA 189.A O no hydrogen 3.085 N/A LEU 194.A N VAL 190.A O no hydrogen 3.103 N/A GLU 195.A N GLN 191.A O no hydrogen 2.842 N/A GLY 196.A N ALA 192.A O no hydrogen 2.867 N/A LEU 197.A N LEU 194.A O no hydrogen 2.928 N/A GLY 198.A N GLU 195.A O no hydrogen 2.875 N/A VAL 199.A N LEU 194.A O no hydrogen 3.333 N/A ARG 200.A N LEU 168.A O no hydrogen 2.997 N/A HIS 202.A N VAL 170.A O no hydrogen 2.681 N/A HIS 202.A ND1 VAL 170.A O no hydrogen 3.247 N/A GLY 204.A N ALA 172.A O no hydrogen 2.714 N/A VAL 206.A N SER 222.A OG no hydrogen 2.995 N/A ALA 208.A N HIS 220.A O no hydrogen 2.791 N/A SER 209.A N.A HIS 220.A O no hydrogen 3.124 N/A SER 209.A N.B HIS 220.A O no hydrogen 3.134 N/A LEU 210.A N GLU 116.A O no hydrogen 2.953 N/A LYS 211.A N GLU 218.A O no hydrogen 3.045 N/A LYS 212.A N ASP 118.A OD1 no hydrogen 2.925 N/A LYS 212.A NZ ASP 118.A O no hydrogen 3.290 N/A ALA 213.A N GLY 216.A O no hydrogen 3.073 N/A GLY 216.A N ALA 213.A O no hydrogen 3.047 N/A LEU 217.A N CYS 229.A O no hydrogen 2.757 N/A GLU 218.A N LYS 211.A O no hydrogen 2.742 N/A ALA 219.A N ILE 227.A O no hydrogen 2.781 N/A HIS 220.A N SER 209.A O.A no hydrogen 2.796 N/A HIS 220.A N SER 209.A O.B no hydrogen 2.865 N/A LEU 221.A N GLU 225.A O no hydrogen 2.749 N/A SER 222.A N VAL 206.A O no hydrogen 2.795 N/A SER 222.A OG VAL 206.A O no hydrogen 3.377 N/A GLY 224.A N LEU 221.A O no hydrogen 3.024 N/A GLU 225.A N ASP 223.A OD1 no hydrogen 3.031 N/A ILE 227.A N ALA 219.A O no hydrogen 2.912 N/A CYS 229.A N LEU 217.A O no hydrogen 3.003 N/A CYS 229.A SG LEU 231.A O no hydrogen 3.990 N/A ASP 230.A N ARG 144.A O no hydrogen 2.745 N/A LEU 231.A N ARG 144.A O no hydrogen 3.403 N/A VAL 233.A N LEU 146.A O no hydrogen 2.772 N/A SER 234.A N TYR 124.A O no hydrogen 2.850 N/A ALA 235.A N LEU 148.A O no hydrogen 2.731 N/A ARG 239.A N GLU 109.A O no hydrogen 2.851 N/A ARG 239.A NE.A PRO 240.A O no hydrogen 3.003 N/A ARG 241.A N GLY 107.A O no hydrogen 3.020 N/A ARG 241.A NE GLU 109.A OE2.B no hydrogen 2.906 N/A ARG 241.A NH1 TRP 106.A O no hydrogen 2.911 N/A ARG 241.A NH2 GLU 109.A OE2.B no hydrogen 3.097 N/A THR 242.A N GLU 243.A OE1.A no hydrogen 2.893 N/A THR 242.A OG1 GLU 243.A OE1.A no hydrogen 3.497 N/A PHE 246.A N THR 242.A O no hydrogen 2.852 N/A ALA 247.A N GLU 243.A O no hydrogen 3.030 N/A ALA 248.A N LEU 244.A O no hydrogen 3.227 N/A GLY 249.A N PHE 246.A O no hydrogen 2.853 N/A LEU 250.A N ALA 245.A O no hydrogen 2.905 N/A ALA 251.A N SER 265.A OG no hydrogen 2.967 N/A ASN 253.A N GLY 255.A O no hydrogen 2.761 N/A GLY 255.A N GLU 277.A OE1 no hydrogen 2.990 N/A ILE 256.A N CYS 275.A O no hydrogen 2.940 N/A VAL 257.A N ALA 251.A O no hydrogen 3.000 N/A VAL 258.A N GLU 277.A O no hydrogen 2.960 N/A ASP 259.A N ARG 263.A O no hydrogen 3.124 N/A ARG 260.A NE ASP 279.A OD2 no hydrogen 2.659 N/A ARG 260.A NH1 ALA 381.A O no hydrogen 2.733 N/A ARG 260.A NH2 ASP 279.A OD2 no hydrogen 3.225 N/A ARG 260.A NH2 ALA 381.A O no hydrogen 2.946 N/A SER 261.A N ASP 259.A OD1 no hydrogen 2.902 N/A SER 261.A OG ASP 259.A OD1 no hydrogen 2.916 N/A LEU 262.A N ASP 259.A O no hydrogen 2.843 N/A ARG 263.A N ASP 259.A OD1 no hydrogen 3.177 N/A ARG 263.A NE.B SER 261.A OG no hydrogen 2.788 N/A ARG 263.A NH1.A THR 264.A O no hydrogen 2.863 N/A THR 264.A N ILE 269.A O no hydrogen 2.951 N/A THR 264.A OG1 HIS 266.A O no hydrogen 3.149 N/A THR 264.A OG1 ILE 269.A O no hydrogen 2.757 N/A HIS 266.A N THR 264.A OG1 no hydrogen 3.163 N/A ASN 268.A ND2 ASP 101.A OD1 no hydrogen 2.907 N/A ILE 269.A N HIS 266.A O no hydrogen 3.392 N/A TYR 270.A N LEU 102.A O no hydrogen 2.844 N/A ALA 271.A N LEU 262.A O no hydrogen 2.935 N/A LEU 272.A N LEU 104.A O no hydrogen 3.054 N/A CYS 275.A SG LEU 104.A O no hydrogen 3.286 N/A CYS 275.A SG LEU 272.A O no hydrogen 3.734 N/A ALA 276.A N GLY 273.A O no hydrogen 2.879 N/A GLU 277.A N ILE 256.A O no hydrogen 2.778 N/A VAL 278.A N LEU 281.A O no hydrogen 2.889 N/A ASP 279.A N VAL 258.A O no hydrogen 2.948 N/A LEU 281.A N VAL 278.A O no hydrogen 2.923 N/A TYR 285.A OH MET 312.A O no hydrogen 2.710 N/A MET 290.A N VAL 286.A O no hydrogen 2.826 N/A ALA 291.A N MET 287.A O no hydrogen 3.245 N/A CYS 292.A N PRO 288.A O no hydrogen 2.935 N/A CYS 292.A SG PRO 288.A O no hydrogen 3.312 N/A CYS 292.A SG TYR 309.A OH no hydrogen 3.091 N/A ALA 293.A N LEU 289.A O no hydrogen 2.959 N/A ARG 294.A N MET 290.A O no hydrogen 3.133 N/A ALA 295.A N ALA 291.A O no hydrogen 3.222 N/A LEU 296.A N CYS 292.A O no hydrogen 2.963 N/A ALA 297.A N ALA 293.A O no hydrogen 3.106 N/A GLN 298.A N ARG 294.A O no hydrogen 3.496 N/A THR 299.A N ALA 295.A O no hydrogen 3.041 N/A THR 299.A OG1 ALA 295.A O no hydrogen 3.465 N/A THR 299.A OG1 SER 305.A O no hydrogen 3.172 N/A LEU 300.A N LEU 296.A O no hydrogen 2.777 N/A ALA 301.A N ALA 297.A O no hydrogen 3.114 N/A ALA 301.A N GLN 298.A O no hydrogen 2.967 N/A GLY 302.A N THR 299.A O no hydrogen 3.071 N/A ASN 303.A N GLN 298.A O no hydrogen 2.881 N/A ASN 303.A ND2 GLN 298.A OE1 no hydrogen 2.858 N/A SER 305.A N THR 299.A OG1 no hydrogen 2.852 N/A SER 305.A OG ASN 303.A O no hydrogen 2.846 N/A VAL 307.A N ARG 260.A O no hydrogen 2.967 N/A VAL 314.A N VAL 325.A O no hydrogen 2.720 N/A VAL 316.A N LEU 323.A O no hydrogen 2.798 N/A LYS 317.A N GLU 156.A OE2 no hydrogen 2.607 N/A LYS 317.A NZ PRO 43.A O no hydrogen 2.774 N/A LYS 317.A NZ SER 46.A OG no hydrogen 3.240 N/A LYS 317.A NZ GLU 156.A OE1 no hydrogen 2.926 N/A THR 318.A N VAL 316.A O no hydrogen 2.902 N/A THR 318.A OG1 CYS 321.A O no hydrogen 2.889 N/A CYS 321.A N THR 318.A O no hydrogen 2.906 N/A VAL 324.A N LEU 361.A O no hydrogen 2.882 N/A VAL 325.A N VAL 314.A O no hydrogen 2.796 N/A SER 326.A N TYR 359.A O no hydrogen 2.889 N/A ARG 330.A NH2.B GLY 280.A O no hydrogen 2.648 N/A GLN 335.A N ARG 350.A O no hydrogen 2.958 N/A LEU 337.A N LEU 348.A O no hydrogen 2.747 N/A GLU 339.A N LYS 346.A O no hydrogen 2.723 N/A SER 341.A N ASP 344.A O no hydrogen 3.166 N/A ASP 344.A N SER 341.A O no hydrogen 2.884 N/A LEU 345.A N THR 362.A OG1 no hydrogen 3.007 N/A LYS 346.A N GLU 339.A O no hydrogen 2.834 N/A LYS 346.A NZ GLU 368.A OE1 no hydrogen 3.494 N/A VAL 347.A N ALA 360.A O no hydrogen 2.773 N/A LEU 348.A N LEU 337.A O no hydrogen 2.967 N/A CYS 349.A N GLY 358.A O no hydrogen 2.892 N/A CYS 349.A SG GLY 334.A O no hydrogen 3.572 N/A ARG 350.A N GLN 335.A O no hydrogen 2.975 N/A ARG 350.A NH1 GLY 354.A O no hydrogen 2.861 N/A ASP 351.A N ARG 355.A O no hydrogen 2.940 N/A GLY 354.A N ASP 351.A O no hydrogen 2.796 N/A ARG 355.A N ASP 351.A OD1 no hydrogen 2.866 N/A ARG 355.A NE.B GLU 375.A O no hydrogen 2.837 N/A ARG 355.A NH2.B GLU 375.A O no hydrogen 3.058 N/A ILE 357.A N CYS 349.A O no hydrogen 2.787 N/A TYR 359.A N SER 326.A O no hydrogen 2.977 N/A TYR 359.A OH ASN 373.A OD1 no hydrogen 2.767 N/A ALA 360.A N VAL 347.A O no hydrogen 2.795 N/A LEU 361.A N VAL 324.A O no hydrogen 2.861 N/A THR 362.A N LEU 345.A O no hydrogen 2.980 N/A THR 362.A OG1 THR 343.A O no hydrogen 2.690 N/A GLY 363.A N PRO 322.A O no hydrogen 2.801 N/A ALA 364.A N ASP 344.A OD1 no hydrogen 2.780 N/A ALA 365.A N THR 362.A O no hydrogen 3.065 N/A VAL 366.A N GLY 363.A O no hydrogen 3.322 N/A ASN 367.A N ALA 364.A O no hydrogen 3.233 N/A GLU 368.A N ALA 365.A O no hydrogen 2.967 N/A LYS 369.A N VAL 366.A O no hydrogen 3.015 N/A LEU 372.A N GLU 368.A O no hydrogen 3.016 N/A ASN 373.A N LYS 369.A O no hydrogen 2.922 N/A LYS 374.A N ALA 371.A O no hydrogen 3.092 N/A GLU 375.A N LEU 372.A O no hydrogen 2.873 N/A LEU 376.A N ASN 373.A O no hydrogen 3.396 N/A LEU 379.A N GLY 310.A O no hydrogen 3.331 N/A MET 380.A N TYR 309.A O no hydrogen 3.175 N/A