Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 4tx8_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): TRP 5.A N SER 18.A O no hydrogen 2.935 N/A ALA 6.A N TYR 11.A OH no hydrogen 3.025 N/A GLY 8.A N ALA 32.A O no hydrogen 2.565 N/A THR 9.A OG1 ALA 6.A O no hydrogen 2.826 N/A TYR 11.A N HIS 30.A O no hydrogen 2.624 N/A TYR 11.A OH ALA 6.A O no hydrogen 3.424 N/A LYS 12.A N ASP 15.A OD2 no hydrogen 2.836 N/A GLY 14.A N ALA 26.A O no hydrogen 3.000 N/A ASP 15.A N LYS 12.A O no hydrogen 3.030 N/A VAL 17.A N TYR 24.A O no hydrogen 3.061 N/A SER 18.A N PRO 3.A O no hydrogen 2.862 N/A TYR 19.A N ALA 22.A O no hydrogen 2.745 N/A ASN 20.A ND2 ASP 360.A O no hydrogen 2.944 N/A ALA 22.A N TYR 19.A O no hydrogen 2.951 N/A ASN 23.A ND2 GLY 51.A O no hydrogen 2.535 N/A TYR 24.A N VAL 17.A O no hydrogen 3.158 N/A TYR 24.A OH ARG 359.A O no hydrogen 2.680 N/A THR 25.A N THR 48.A O no hydrogen 2.677 N/A THR 25.A OG1 GLY 50.A O no hydrogen 2.889 N/A ALA 26.A N ASP 15.A O no hydrogen 2.799 N/A LEU 27.A N LEU 46.A O no hydrogen 2.784 N/A HIS 30.A N TYR 11.A O no hydrogen 2.902 N/A HIS 30.A ND1 VAL 28.A O no hydrogen 2.734 N/A ALA 32.A N THR 9.A O no hydrogen 3.013 N/A GLY 35.A N GLU 7.A OE2 no hydrogen 2.867 N/A ALA 36.A N TYR 33.A O no hydrogen 3.194 N/A ASN 37.A N GLU 7.A OE1 no hydrogen 2.874 N/A ASN 39.A ND2 ASN 37.A OD1 no hydrogen 2.991 N/A ALA 42.A N ASN 39.A O no hydrogen 2.923 N/A ALA 42.A N ASN 39.A OD1 no hydrogen 2.923 N/A SER 43.A OG ASN 39.A O no hydrogen 2.842 N/A LEU 46.A N SER 43.A O no hydrogen 3.024 N/A TRP 47.A N SER 43.A O no hydrogen 2.888 N/A THR 48.A N THR 25.A O no hydrogen 2.959 N/A GLY 50.A N ASN 23.A O no hydrogen 2.866 N/A CYS 53.A SG VAL 16.A O no hydrogen 3.795 N/A HIS 62.A NE2 PRO 344.A O no hydrogen 2.942 N/A ALA 63.A N ARG 347.A O no hydrogen 2.641 N/A LEU 64.A N ASP 89.A OD2 no hydrogen 2.848 N/A VAL 65.A N VAL 349.A O no hydrogen 2.748 N/A GLY 66.A N VAL 90.A O no hydrogen 3.072 N/A TYR 67.A N THR 351.A O no hydrogen 3.416 N/A TYR 67.A OH ASP 171.A OD2 no hydrogen 2.619 N/A TRP 68.A N VAL 92.A O no hydrogen 2.790 N/A TRP 68.A NE1 PHE 79.A O no hydrogen 2.973 N/A HIS 69.A N ASN 355.A OD1 no hydrogen 2.814 N/A HIS 69.A NE2 SER 353.A OG no hydrogen 2.752 N/A ASN 70.A N ALA 94.A O no hydrogen 2.665 N/A ASN 70.A ND2 THR 107.A O no hydrogen 2.900 N/A ASN 73.A N GLY 76.A O no hydrogen 3.201 N/A SER 75.A N ASN 73.A OD1 no hydrogen 2.798 N/A SER 75.A OG HIS 69.A ND1 no hydrogen 3.413 N/A SER 75.A OG ASN 73.A OD1 no hydrogen 2.593 N/A GLY 76.A N ASN 73.A O no hydrogen 2.779 N/A SER 77.A OG ALA 78.A O no hydrogen 3.071 N/A GLN 83.A N PRO 80.A O no hydrogen 3.010 N/A VAL 84.A N LEU 81.A O no hydrogen 3.229 N/A ASP 87.A N SER 85.A OG no hydrogen 3.231 N/A TRP 88.A N SER 85.A O no hydrogen 3.208 N/A ASP 89.A N LEU 64.A O no hydrogen 2.876 N/A VAL 90.A N LEU 64.A O no hydrogen 3.202 N/A ILE 91.A N LYS 131.A O no hydrogen 2.731 N/A VAL 92.A N GLY 66.A O no hydrogen 2.813 N/A VAL 93.A N VAL 133.A O no hydrogen 2.732 N/A ALA 94.A N TRP 68.A O no hydrogen 2.986 N/A ALA 96.A N SER 135.A O no hydrogen 2.876 N/A ASP 97.A N SER 105.A O no hydrogen 2.798 N/A ASP 98.A N ASN 140.A O no hydrogen 2.921 N/A ALA 99.A N ASN 103.A O no hydrogen 2.772 N/A GLY 100.A N ASP 98.A OD1 no hydrogen 3.223 N/A GLY 100.A N ASN 103.A O no hydrogen 3.188 N/A ASN 101.A N ASN 101.A OD1 no hydrogen 2.645 N/A VAL 104.A N SER 157.A OG no hydrogen 2.894 N/A SER 105.A N ASP 97.A O no hydrogen 2.817 N/A ASP 109.A N ASN 70.A OD1 no hydrogen 2.866 N/A ALA 111.A N ASP 109.A OD1 no hydrogen 2.922 N/A ALA 112.A N ASP 109.A O no hydrogen 2.880 N/A GLY 113.A N PRO 110.A O no hydrogen 2.863 N/A GLN 117.A N SER 114.A OG no hydrogen 3.107 N/A GLN 117.A NE2 ASP 121.A OD1 no hydrogen 2.787 N/A PHE 118.A N SER 114.A O no hydrogen 2.889 N/A ILE 119.A N ALA 115.A O no hydrogen 2.986 N/A GLN 120.A N ALA 116.A O no hydrogen 3.109 N/A ASP 121.A N GLN 117.A O no hydrogen 2.784 N/A ILE 122.A N PHE 118.A O no hydrogen 2.959 N/A ARG 123.A N ILE 119.A O no hydrogen 3.252 N/A ALA 124.A N GLN 120.A O no hydrogen 2.953 N/A GLN 125.A N ASP 121.A O no hydrogen 2.985 N/A GLN 125.A NE2 LEU 81.A O no hydrogen 3.062 N/A GLN 125.A NE2 VAL 84.A O no hydrogen 3.345 N/A GLN 126.A N ILE 122.A O no hydrogen 2.905 N/A GLN 126.A NE2 GLY 166.A O no hydrogen 2.951 N/A GLN 126.A NE2 ASP 168.A OD2 no hydrogen 2.852 N/A ALA 127.A N ARG 123.A O no hydrogen 2.771 N/A LYS 128.A N GLN 125.A O no hydrogen 3.082 N/A GLY 129.A N GLN 126.A O no hydrogen 2.859 N/A LYS 130.A N GLN 125.A O no hydrogen 3.091 N/A LYS 130.A NZ ALA 86.A O no hydrogen 2.854 N/A LYS 130.A NZ TRP 88.A O no hydrogen 2.719 N/A LYS 131.A N ASP 89.A O no hydrogen 3.064 N/A VAL 132.A N ASP 168.A OD2 no hydrogen 2.856 N/A VAL 133.A N ILE 91.A O no hydrogen 3.011 N/A LEU 134.A N GLY 169.A O no hydrogen 2.997 N/A SER 135.A N VAL 93.A O no hydrogen 2.841 N/A SER 135.A OG ASP 171.A OD2 no hydrogen 3.001 N/A LEU 136.A N ASP 171.A O no hydrogen 2.780 N/A ASN 140.A ND2 ASP 97.A OD1 no hydrogen 2.846 N/A SER 142.A OG GLY 177.A O no hydrogen 3.126 N/A VAL 143.A N SER 178.A OG no hydrogen 2.979 N/A ASN 146.A N GLN 150.A OE1 no hydrogen 2.668 N/A GLN 150.A N ASN 147.A O no hydrogen 3.171 N/A GLN 150.A N ASN 147.A OD1 no hydrogen 2.930 N/A VAL 151.A N ASN 147.A O no hydrogen 3.183 N/A GLN 152.A N ALA 148.A O no hydrogen 3.079 N/A ASN 153.A N THR 149.A O no hydrogen 3.142 N/A ASN 153.A ND2 ASN 101.A O no hydrogen 3.083 N/A ASN 153.A ND2 ASN 101.A OD1 no hydrogen 3.652 N/A PHE 154.A N GLN 150.A O no hydrogen 2.864 N/A VAL 155.A N VAL 151.A O no hydrogen 2.896 N/A ASN 156.A N GLN 152.A O no hydrogen 2.876 N/A SER 157.A N ASN 153.A O no hydrogen 2.985 N/A SER 157.A OG VAL 104.A O no hydrogen 3.378 N/A SER 157.A OG ASN 153.A O no hydrogen 2.763 N/A SER 157.A OG PHE 154.A O no hydrogen 3.414 N/A LEU 158.A N PHE 154.A O no hydrogen 3.155 N/A TYR 159.A N VAL 155.A O no hydrogen 2.989 N/A GLY 160.A N ASN 156.A O no hydrogen 3.037 N/A ILE 161.A N SER 157.A O no hydrogen 3.072 N/A LEU 162.A N LEU 158.A O no hydrogen 2.888 N/A THR 163.A N TYR 159.A O no hydrogen 3.049 N/A THR 163.A OG1 TYR 159.A O no hydrogen 2.764 N/A THR 163.A OG1 GLY 160.A O no hydrogen 3.139 N/A GLN 164.A N GLY 160.A O no hydrogen 3.086 N/A TYR 165.A N ILE 161.A O no hydrogen 2.979 N/A GLY 166.A N LEU 162.A O no hydrogen 2.748 N/A ASP 168.A N VAL 132.A O no hydrogen 2.834 N/A ILE 170.A N TYR 206.A O no hydrogen 2.973 N/A ASP 171.A N LEU 134.A O no hydrogen 2.879 N/A LEU 172.A N SER 208.A O no hydrogen 2.873 N/A ASP 173.A N LEU 136.A O no hydrogen 2.803 N/A GLU 175.A N GLU 175.A OE1 no hydrogen 2.744 N/A SER 178.A OG GLY 141.A O no hydrogen 3.189 N/A SER 178.A OG LEU 174.A O no hydrogen 2.746 N/A VAL 182.A N GLY 225.A O no hydrogen 2.900 N/A ALA 184.A N VAL 181.A O no hydrogen 3.135 N/A VAL 187.A N ALA 184.A O no hydrogen 3.098 N/A ASN 189.A N PRO 185.A O no hydrogen 3.025 N/A ASN 189.A ND2 LEU 145.A O no hydrogen 2.558 N/A LEU 190.A N VAL 186.A O no hydrogen 2.811 N/A SER 192.A N SER 188.A O no hydrogen 3.194 N/A SER 192.A OG GLN 196.A OE1 no hydrogen 3.076 N/A ALA 193.A N ASN 189.A O no hydrogen 2.845 N/A VAL 194.A N LEU 190.A O no hydrogen 2.942 N/A LYS 195.A N VAL 191.A O no hydrogen 3.044 N/A LYS 195.A NZ GLY 236.A O no hydrogen 2.935 N/A GLN 196.A N SER 192.A O no hydrogen 3.003 N/A GLN 196.A NE2 GLN 152.A OE1.A no hydrogen 2.797 N/A LEU 197.A N ALA 193.A O no hydrogen 2.943 N/A LYS 198.A N VAL 194.A O no hydrogen 2.883 N/A LYS 198.A NZ ASP 240.A OD1 no hydrogen 2.788 N/A ALA 199.A N LYS 195.A O no hydrogen 3.024 N/A LYS 200.A N GLN 196.A O no hydrogen 3.254 N/A ILE 201.A N LEU 197.A O no hydrogen 3.064 N/A GLY 202.A N LYS 198.A O no hydrogen 2.696 N/A PHE 205.A N GLY 202.A O no hydrogen 3.022 N/A TYR 206.A N ASP 168.A O no hydrogen 2.880 N/A LEU 207.A N SER 242.A OG no hydrogen 2.947 N/A SER 208.A N ILE 170.A O no hydrogen 3.040 N/A SER 208.A OG ASP 171.A OD1 no hydrogen 2.545 N/A MET 209.A N VAL 243.A O no hydrogen 3.225 N/A ALA 210.A N LEU 172.A O no hydrogen 2.900 N/A GLU 212.A N GLU 175.A OE2 no hydrogen 2.884 N/A HIS 213.A NE2 GLY 252.A O no hydrogen 3.294 N/A TYR 215.A N GLU 212.A O no hydrogen 2.909 N/A VAL 216.A N HIS 213.A O no hydrogen 3.030 N/A GLN 217.A N GLN 217.A OE1 no hydrogen 2.859 N/A GLN 217.A NE2 GLY 274.A O no hydrogen 2.940 N/A GLY 218.A N HIS 213.A O no hydrogen 2.976 N/A GLY 219.A N VAL 216.A O no hydrogen 2.986 N/A PHE 220.A N GLN 217.A O no hydrogen 3.040 N/A VAL 221.A N GLY 218.A O no hydrogen 2.956 N/A ALA 222.A N GLY 218.A O no hydrogen 2.912 N/A GLY 224.A N TRP 227.A O no hydrogen 3.167 N/A TRP 227.A N GLY 224.A O no hydrogen 3.049 N/A GLY 228.A N PRO 214.A O no hydrogen 2.985 N/A ALA 229.A N ASN 226.A O no hydrogen 3.073 N/A TYR 230.A N TYR 215.A O no hydrogen 2.913 N/A LEU 231.A N GLY 228.A O no hydrogen 3.147 N/A ILE 234.A N TYR 230.A O no hydrogen 3.042 N/A ASP 235.A N LEU 231.A O no hydrogen 2.920 N/A GLY 236.A N PRO 232.A O no hydrogen 2.885 N/A LEU 237.A N ILE 233.A O no hydrogen 3.170 N/A LEU 237.A N ILE 234.A O no hydrogen 3.212 N/A ARG 238.A N ASP 235.A O no hydrogen 3.466 N/A ARG 238.A NE ASP 235.A OD1 no hydrogen 3.015 N/A ARG 238.A NH1 LYS 293.A O no hydrogen 3.193 N/A ARG 238.A NH1 GLY 294.A O no hydrogen 3.206 N/A ARG 238.A NH2 ASP 235.A OD1 no hydrogen 3.186 N/A ARG 238.A NH2 LYS 293.A O no hydrogen 2.831 N/A ASP 240.A N LEU 237.A O no hydrogen 2.841 N/A SER 242.A N LEU 207.A O no hydrogen 2.786 N/A SER 242.A OG LEU 207.A O no hydrogen 3.378 N/A VAL 243.A N LEU 207.A O no hydrogen 3.367 N/A ILE 244.A N GLN 299.A O no hydrogen 2.712 N/A HIS 245.A N MET 209.A O no hydrogen 2.957 N/A HIS 245.A ND1 HIS 245.A O no hydrogen 2.851 N/A GLN 247.A N PRO 211.A O no hydrogen 2.974 N/A GLN 247.A NE2 ASP 173.A OD1 no hydrogen 2.962 N/A TYR 248.A N GLY 303.A O no hydrogen 2.938 N/A ASN 250.A N SER 313.A O no hydrogen 3.151 N/A ASN 251.A ND2 GLU 212.A OE1 no hydrogen 2.702 N/A ASN 251.A ND2 TYR 249.A O no hydrogen 3.038 N/A GLY 252.A N GLU 265.A OE2 no hydrogen 3.253 N/A LEU 254.A N LEU 263.A O no hydrogen 3.074 N/A TYR 258.A N THR 256.A OG1 no hydrogen 3.134 N/A SER 259.A OG GLY 261.A O no hydrogen 3.245 N/A LEU 263.A N LEU 254.A O no hydrogen 2.769 N/A SER 267.A N ALA 264.A O no hydrogen 3.144 N/A SER 267.A OG ALA 264.A O no hydrogen 2.756 N/A MET 270.A N SER 267.A OG no hydrogen 3.051 N/A LEU 271.A N SER 267.A O no hydrogen 3.406 N/A VAL 272.A N ALA 268.A O no hydrogen 2.765 N/A GLY 273.A N ASP 269.A O no hydrogen 2.587 N/A GLY 274.A N MET 270.A O no hydrogen 2.800 N/A SER 275.A N LEU 271.A O no hydrogen 3.152 N/A SER 275.A OG LEU 271.A O no hydrogen 2.787 N/A LYS 276.A N VAL 272.A O no hydrogen 2.830 N/A LYS 276.A NZ LYS 338.A O no hydrogen 2.675 N/A MET 277.A N GLY 273.A O no hydrogen 3.045 N/A LEU 278.A N GLY 274.A O no hydrogen 3.397 N/A ILE 279.A N SER 275.A O no hydrogen 3.113 N/A ILE 279.A N LYS 276.A O no hydrogen 3.049 N/A GLU 280.A N LYS 276.A O no hydrogen 2.706 N/A GLY 281.A N MET 277.A O no hydrogen 2.960 N/A PHE 282.A N PHE 292.A O no hydrogen 3.239 N/A ILE 284.A N GLY 290.A O no hydrogen 2.954 N/A ALA 285.A N GLY 219.A O no hydrogen 2.947 N/A ASN 286.A N ILE 284.A O no hydrogen 2.531 N/A SER 291.A OG GLY 290.A O no hydrogen 3.264 N/A PHE 292.A N PHE 282.A O no hydrogen 2.927 N/A LEU 295.A N LEU 278.A O no hydrogen 2.759 N/A ARG 296.A N GLN 299.A OE1 no hydrogen 3.074 N/A ARG 296.A NE ASP 298.A OD1 no hydrogen 3.279 N/A ARG 296.A NE ASP 298.A OD2 no hydrogen 2.846 N/A ARG 296.A NH2 ASP 298.A OD1 no hydrogen 2.887 N/A GLN 299.A N ARG 296.A O no hydrogen 2.890 N/A GLN 299.A NE2 ARG 238.A O no hydrogen 2.817 N/A GLN 299.A NE2 LEU 241.A O no hydrogen 2.920 N/A VAL 300.A N PRO 297.A O no hydrogen 3.130 N/A ALA 301.A N ILE 244.A O no hydrogen 2.972 N/A PHE 302.A N GLY 348.A O no hydrogen 3.137 N/A GLY 303.A N VAL 246.A O no hydrogen 2.828 N/A VAL 304.A N MET 350.A O no hydrogen 2.965 N/A SER 306.A N TRP 352.A O no hydrogen 2.832 N/A SER 306.A OG SER 310.A OG no hydrogen 2.768 N/A SER 306.A OG TRP 352.A O no hydrogen 3.053 N/A SER 310.A N GLY 307.A O no hydrogen 3.045 N/A SER 310.A OG SER 306.A OG no hydrogen 2.768 N/A SER 310.A OG TRP 352.A O no hydrogen 3.101 N/A ASN 312.A N ASN 250.A OD1 no hydrogen 2.765 N/A SER 313.A N ASN 250.A OD1 no hydrogen 3.354 N/A SER 313.A OG GLU 265.A OE1 no hydrogen 3.165 N/A SER 313.A OG GLU 265.A OE2 no hydrogen 2.649 N/A THR 317.A OG1 THR 320.A OG1 no hydrogen 3.192 N/A THR 320.A N THR 317.A OG1 no hydrogen 3.088 N/A THR 320.A OG1 THR 317.A OG1 no hydrogen 3.192 N/A VAL 321.A N THR 317.A O no hydrogen 3.204 N/A ALA 322.A N ALA 318.A O no hydrogen 2.950 N/A LYS 323.A N ASP 319.A O no hydrogen 2.882 N/A ALA 324.A N THR 320.A O no hydrogen 3.014 N/A LEU 325.A N VAL 321.A O no hydrogen 2.950 N/A THR 326.A N ALA 322.A O no hydrogen 3.026 N/A THR 326.A OG1 ALA 322.A O no hydrogen 3.366 N/A THR 326.A OG1 LYS 323.A O no hydrogen 3.261 N/A THR 326.A OG1 GLN 332.A O no hydrogen 3.070 N/A CYS 327.A N LYS 323.A O no hydrogen 3.043 N/A CYS 327.A SG VAL 337.A O no hydrogen 3.743 N/A LEU 328.A N ALA 324.A O no hydrogen 3.007 N/A THR 329.A N LEU 325.A O no hydrogen 2.824 N/A THR 329.A OG1 LEU 325.A O no hydrogen 2.843 N/A THR 329.A OG1 THR 326.A O no hydrogen 3.473 N/A THR 330.A N THR 326.A O no hydrogen 2.797 N/A THR 330.A OG1 THR 326.A O no hydrogen 2.753 N/A LEU 331.A N CYS 327.A O no hydrogen 2.968 N/A GLN 332.A NE2 THR 330.A O no hydrogen 3.477 N/A SER 336.A N ASP 269.A OD2 no hydrogen 3.376 N/A SER 336.A OG ASP 269.A OD2 no hydrogen 2.728 N/A VAL 337.A N ASP 269.A OD1 no hydrogen 3.151 N/A TYR 343.A N LEU 328.A O no hydrogen 2.855 N/A PHE 346.A N TYR 343.A O no hydrogen 3.118 N/A ARG 347.A N PRO 297.A O no hydrogen 3.276 N/A ARG 347.A N VAL 300.A O no hydrogen 3.184 N/A ARG 347.A NE ASP 298.A O no hydrogen 2.720 N/A ARG 347.A NH1 PHE 59.A O no hydrogen 3.113 N/A ARG 347.A NH1 ALA 60.A O no hydrogen 3.009 N/A ARG 347.A NH2 ASP 298.A O no hydrogen 3.238 N/A VAL 349.A N ALA 63.A O no hydrogen 3.082 N/A MET 350.A N PHE 302.A O no hydrogen 2.849 N/A THR 351.A N VAL 65.A O no hydrogen 2.811 N/A TRP 352.A N VAL 304.A O no hydrogen 3.383 N/A SER 353.A N SER 306.A OG no hydrogen 3.112 N/A SER 353.A OG HIS 69.A NE2 no hydrogen 2.752 N/A ILE 354.A N TYR 67.A O no hydrogen 2.788 N/A TRP 356.A N SER 353.A OG no hydrogen 3.084 N/A ASP 357.A N SER 353.A O no hydrogen 2.960 N/A ARG 358.A N ILE 354.A O no hydrogen 2.873 N/A ARG 359.A N ASN 355.A O no hydrogen 2.880 N/A ARG 359.A NE SER 75.A O no hydrogen 2.971 N/A ARG 359.A NH1 PRO 40.A O no hydrogen 3.050 N/A ARG 359.A NH1 TRP 47.A O no hydrogen 2.692 N/A ARG 359.A NH2 TRP 47.A O no hydrogen 3.363 N/A ASP 360.A N TRP 356.A O no hydrogen 2.947 N/A GLY 361.A N ARG 358.A O no hydrogen 3.123 N/A TYR 362.A N ASP 357.A O no hydrogen 2.665 N/A PHE 364.A N ASP 357.A OD1 no hydrogen 2.986 N/A SER 365.A N ASP 357.A OD1 no hydrogen 2.877 N/A SER 365.A OG ASP 357.A OD1 no hydrogen 3.403 N/A SER 365.A OG ASP 357.A OD2 no hydrogen 2.668 N/A ARG 366.A N TYR 362.A O no hydrogen 3.206 N/A ARG 366.A NH1 ASN 21.A O no hydrogen 2.870 N/A VAL 368.A N PHE 364.A O no hydrogen 3.080 N/A ALA 369.A N SER 365.A O no hydrogen 2.937 N/A ALA 370.A N ARG 366.A O no hydrogen 3.259 N/A SER 371.A N PRO 367.A O no hydrogen 3.003 N/A SER 371.A OG PRO 367.A O no hydrogen 3.128 N/A LEU 372.A N VAL 368.A O no hydrogen 2.927 N/A ARG 373.A N ALA 369.A O no hydrogen 2.886 N/A ARG 373.A NH2 ASP 87.A OD1 no hydrogen 2.876 N/A GLN 374.A N SER 371.A O no hydrogen 3.071 N/A GLN 374.A NE2 LEU 372.A O no hydrogen 3.660 N/A