Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 6i1p_1.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): ARG 11.A NE ASP 9.A OD2 no hydrogen 2.295 N/A ARG 11.A NH2 GLY 2.A O no hydrogen 3.025 N/A PHE 12.A N ASP 9.A O no hydrogen 3.307 N/A THR 15.A N GLU 264.A OE2 no hydrogen 3.214 N/A THR 15.A OG1 GLU 13.A O no hydrogen 3.364 N/A LEU 16.A N GLU 264.A OE2 no hydrogen 3.460 N/A TYR 17.A N GLU 264.A OE1 no hydrogen 2.866 N/A TYR 17.A OH LYS 101.A O no hydrogen 2.106 N/A SER 25.A N LYS 22.A O no hydrogen 2.916 N/A SER 25.A OG HIS 19.A O no hydrogen 3.138 N/A SER 25.A OG LYS 22.A O no hydrogen 2.666 N/A SER 25.A OG ASP 108.A O no hydrogen 3.273 N/A THR 27.A N GLY 24.A O no hydrogen 3.246 N/A THR 27.A OG1 GLY 24.A O no hydrogen 2.533 N/A TYR 30.A N THR 27.A OG1 no hydrogen 3.111 N/A TYR 31.A N THR 27.A O no hydrogen 3.314 N/A TYR 31.A OH GLU 115.A OE1 no hydrogen 2.385 N/A LEU 32.A N LEU 28.A O no hydrogen 2.896 N/A ARG 33.A N ASP 29.A O no hydrogen 2.888 N/A HIS 34.A N TYR 31.A O no hydrogen 3.366 N/A HIS 34.A ND1 TYR 30.A O no hydrogen 2.934 N/A GLY 35.A N LEU 32.A O no hydrogen 3.028 N/A GLY 36.A N TYR 31.A O no hydrogen 2.773 N/A TYR 37.A N GLU 115.A OE1 no hydrogen 2.948 N/A TYR 37.A OH HIS 111.A ND1 no hydrogen 2.622 N/A ALA 40.A N GLU 115.A OE2 no hydrogen 2.476 N/A LYS 41.A N TYR 37.A O no hydrogen 3.309 N/A ARG 42.A N GLU 38.A O no hydrogen 2.977 N/A VAL 43.A N THR 39.A O no hydrogen 2.967 N/A LEU 44.A N ALA 40.A O no hydrogen 2.942 N/A GLU 46.A N ARG 42.A O no hydrogen 2.967 N/A LYS 47.A N VAL 43.A O no hydrogen 3.049 N/A LYS 47.A NZ GLU 55.A OE1 no hydrogen 3.382 N/A THR 48.A OG1 GLU 51.A OE2 no hydrogen 3.368 N/A VAL 52.A N THR 48.A O no hydrogen 3.130 N/A ILE 53.A N PRO 49.A O no hydrogen 2.937 N/A GLU 54.A N ASP 50.A O no hydrogen 2.873 N/A GLU 55.A N GLU 51.A O no hydrogen 2.864 N/A VAL 56.A N VAL 52.A O no hydrogen 3.362 N/A LYS 57.A N ILE 53.A O no hydrogen 2.853 N/A ARG 58.A N GLU 54.A O no hydrogen 2.888 N/A ARG 58.A NE GLU 54.A OE2 no hydrogen 3.186 N/A ARG 58.A NH2 GLU 54.A OE2 no hydrogen 3.232 N/A SER 59.A N GLU 55.A O no hydrogen 2.920 N/A SER 59.A OG VAL 56.A O no hydrogen 2.318 N/A LEU 61.A N SER 59.A OG no hydrogen 3.079 N/A ARG 62.A NE GLY 68.A O no hydrogen 2.756 N/A ARG 62.A NH1 GLN 244.A O no hydrogen 2.962 N/A GLY 63.A N PHE 69.A O no hydrogen 2.994 N/A ARG 64.A N THR 222.A OG1 no hydrogen 3.104 N/A ARG 64.A NH1 GLU 221.A OE2 no hydrogen 2.815 N/A THR 71.A N LEU 61.A O no hydrogen 3.153 N/A LYS 74.A N PRO 70.A O no hydrogen 2.641 N/A LYS 74.A NZ ILE 217.A O no hydrogen 2.318 N/A TRP 75.A N THR 71.A O no hydrogen 2.878 N/A TRP 75.A NE1 ASN 218.A OD1 no hydrogen 2.610 N/A SER 76.A N GLY 72.A O no hydrogen 2.888 N/A SER 76.A OG LEU 73.A O no hydrogen 2.528 N/A PHE 77.A N LEU 73.A O no hydrogen 2.936 N/A PHE 77.A N LYS 74.A O no hydrogen 3.120 N/A MET 78.A N TRP 75.A O no hydrogen 3.087 N/A LYS 80.A NZ TRP 75.A O no hydrogen 2.565 N/A LYS 84.A N ASP 82.A OD1 no hydrogen 3.330 N/A GLN 85.A NE2 THR 127.A OG1 no hydrogen 2.588 N/A HIS 86.A ND1 ILE 124.A O no hydrogen 3.035 N/A HIS 86.A NE2 ASP 82.A OD1 no hydrogen 2.378 N/A HIS 86.A NE2 ASP 82.A OD2 no hydrogen 3.157 N/A ILE 89.A N THR 216.A O no hydrogen 2.942 N/A CYS 90.A N TYR 130.A O no hydrogen 2.864 N/A ASN 91.A ND2 GLY 182.A O no hydrogen 3.278 N/A ALA 92.A N TYR 132.A O no hydrogen 3.023 N/A SER 95.A OG ASP 93.A OD2 no hydrogen 2.993 N/A SER 99.A N GLU 96.A O no hydrogen 3.288 N/A SER 99.A OG GLU 94.A OE2 no hydrogen 3.078 N/A LYS 101.A NZ ASP 102.A OD1 no hydrogen 3.010 N/A LYS 101.A NZ ASP 102.A OD2 no hydrogen 2.895 N/A LYS 101.A NZ GLU 221.A OE1 no hydrogen 3.229 N/A ASP 102.A N GLU 94.A OE2 no hydrogen 3.368 N/A ARG 103.A NH2 TYR 104.A OH no hydrogen 2.285 N/A LEU 106.A N ASP 102.A O no hydrogen 2.999 N/A GLU 107.A N ARG 103.A O no hydrogen 2.982 N/A ASP 108.A N TYR 104.A O no hydrogen 2.923 N/A VAL 109.A N ILE 105.A O no hydrogen 2.963 N/A HIS 111.A ND1 TYR 37.A OH no hydrogen 2.622 N/A ILE 114.A N PRO 110.A O no hydrogen 2.947 N/A GLU 115.A N HIS 111.A O no hydrogen 2.904 N/A GLY 116.A N LEU 112.A O no hydrogen 2.997 N/A MET 117.A N LEU 113.A O no hydrogen 2.858 N/A ILE 118.A N ILE 114.A O no hydrogen 2.900 N/A LEU 119.A N GLU 115.A O no hydrogen 2.908 N/A ALA 120.A N GLY 116.A O no hydrogen 2.945 N/A GLY 121.A N MET 117.A O no hydrogen 2.836 N/A TYR 122.A N ILE 118.A O no hydrogen 2.859 N/A TYR 122.A OH LYS 47.A O no hydrogen 2.168 N/A ALA 123.A N LEU 119.A O no hydrogen 2.957 N/A ILE 124.A N ALA 120.A O no hydrogen 2.916 N/A ALA 126.A N GLY 121.A O no hydrogen 2.832 N/A THR 127.A OG1 GLN 85.A OE1 no hydrogen 2.717 N/A GLY 129.A N ASP 169.A O no hydrogen 2.928 N/A TYR 130.A N LEU 88.A O no hydrogen 3.050 N/A ILE 131.A N HIS 171.A O no hydrogen 2.839 N/A TYR 132.A N CYS 90.A O no hydrogen 3.130 N/A TYR 132.A OH SER 190.A OG no hydrogen 3.055 N/A VAL 133.A N HIS 173.A O no hydrogen 3.134 N/A ARG 134.A NE GLU 136.A OE1 no hydrogen 2.957 N/A ARG 134.A NH1 GLU 94.A O no hydrogen 2.300 N/A ARG 134.A NH2 GLU 136.A OE1 no hydrogen 2.682 N/A TYR 137.A N ARG 134.A O no hydrogen 3.237 N/A TYR 137.A OH GLU 94.A OE1 no hydrogen 2.199 N/A ASP 142.A N ARG 138.A O no hydrogen 2.923 N/A ARG 143.A N ARG 139.A O no hydrogen 2.965 N/A LEU 144.A N ALA 140.A O no hydrogen 2.858 N/A GLU 145.A N ALA 141.A O no hydrogen 2.964 N/A GLN 146.A N ASP 142.A O no hydrogen 2.920 N/A ALA 147.A N ARG 143.A O no hydrogen 2.939 N/A ILE 148.A N LEU 144.A O no hydrogen 2.918 N/A LYS 149.A N GLU 145.A O no hydrogen 2.905 N/A GLU 150.A N GLN 146.A O no hydrogen 2.931 N/A ALA 151.A N ALA 147.A O no hydrogen 2.928 N/A ARG 152.A N ILE 148.A O no hydrogen 2.875 N/A ALA 153.A N LYS 149.A O no hydrogen 2.913 N/A ARG 154.A N GLU 150.A O no hydrogen 2.965 N/A ARG 154.A NH2 ASP 29.A OD2 no hydrogen 3.249 N/A TYR 156.A N ALA 151.A O no hydrogen 2.649 N/A LEU 161.A N PHE 166.A O no hydrogen 2.953 N/A THR 164.A OG1 ASP 165.A OD1 no hydrogen 3.283 N/A SER 167.A OG LYS 159.A O no hydrogen 2.105 N/A HIS 171.A N GLY 129.A O no hydrogen 2.982 N/A HIS 173.A N ILE 131.A O no hydrogen 2.850 N/A GLY 175.A N VAL 133.A O no hydrogen 2.439 N/A TYR 179.A N GLU 350.A OE1 no hydrogen 2.778 N/A CYS 181.A N ALA 178.A O no hydrogen 2.973 N/A GLY 182.A N TYR 179.A O no hydrogen 3.010 N/A GLU 183.A N ILE 180.A O no hydrogen 2.795 N/A THR 185.A N GLU 183.A OE1 no hydrogen 2.676 N/A THR 185.A OG1 GLU 183.A OE1 no hydrogen 2.209 N/A ALA 186.A N GLU 183.A OE1 no hydrogen 2.954 N/A LEU 187.A N GLU 183.A O no hydrogen 2.560 N/A ASN 189.A ND2 ASN 197.A O no hydrogen 2.449 N/A SER 190.A N ALA 186.A O no hydrogen 2.907 N/A SER 190.A OG TYR 132.A OH no hydrogen 3.055 N/A LEU 191.A N LEU 187.A O no hydrogen 2.940 N/A GLU 192.A N MET 188.A O no hydrogen 2.927 N/A LEU 194.A N ASN 189.A O no hydrogen 3.089 N/A ASN 197.A N ARG 195.A O no hydrogen 2.891 N/A ARG 199.A NE ASN 189.A OD1 no hydrogen 2.377 N/A ARG 199.A NH1 GLY 209.A O no hydrogen 3.310 N/A ARG 199.A NH2 ASN 189.A OD1 no hydrogen 2.921 N/A ARG 199.A NH2 GLU 192.A OE1 no hydrogen 2.399 N/A PHE 204.A N GLN 207.A OE1 no hydrogen 2.680 N/A GLN 207.A N PHE 204.A O no hydrogen 2.796 N/A SER 208.A N PHE 204.A O no hydrogen 2.761 N/A GLY 209.A N LYS 213.A O no hydrogen 2.694 N/A GLY 212.A N GLY 209.A O no hydrogen 3.121 N/A LYS 213.A N LEU 210.A O no hydrogen 2.815 N/A THR 216.A N TYR 87.A O no hydrogen 3.127 N/A ASN 218.A N ILE 89.A O no hydrogen 3.425 N/A GLU 221.A N ASN 219.A OD1 no hydrogen 3.328 N/A LEU 223.A N ASN 219.A O no hydrogen 2.943 N/A ALA 224.A N VAL 220.A O no hydrogen 2.925 N/A SER 225.A N GLU 221.A O no hydrogen 2.857 N/A SER 225.A OG GLU 221.A O no hydrogen 2.755 N/A VAL 226.A N THR 222.A O no hydrogen 2.968 N/A VAL 226.A N LEU 223.A O no hydrogen 3.115 N/A VAL 227.A N ALA 224.A O no hydrogen 3.183 N/A MET 230.A N VAL 226.A O no hydrogen 2.978 N/A GLU 231.A N VAL 227.A O no hydrogen 2.833 N/A ARG 232.A N PRO 228.A O no hydrogen 2.737 N/A ALA 238.A N ALA 234.A O no hydrogen 2.915 N/A GLN 239.A N TRP 236.A O no hydrogen 3.312 N/A MET 240.A N PHE 237.A O no hydrogen 3.339 N/A GLY 241.A N LEU 5.A O no hydrogen 3.092 N/A GLN 244.A N GLU 313.A OE2 no hydrogen 3.145 N/A LYS 246.A NZ THR 242.A O no hydrogen 3.341 N/A GLY 247.A N MET 240.A O no hydrogen 2.628 N/A LYS 249.A N LEU 265.A O no hydrogen 2.858 N/A LYS 249.A NZ LEU 250.A O no hydrogen 3.138 N/A LYS 249.A NZ THR 324.A O no hydrogen 2.408 N/A TYR 251.A N TYR 263.A O no hydrogen 2.879 N/A TYR 251.A OH PRO 266.A O no hydrogen 3.075 N/A TYR 251.A OH MET 310.A O no hydrogen 3.259 N/A GLN 252.A N GLY 325.A O no hydrogen 3.300 N/A GLN 252.A NE2 THR 324.A O no hydrogen 3.363 N/A ILE 253.A N GLY 261.A O no hydrogen 2.896 N/A SER 254.A N VAL 327.A O no hydrogen 2.886 N/A SER 254.A OG VAL 327.A O no hydrogen 3.395 N/A VAL 257.A N GLY 255.A O no hydrogen 2.725 N/A LYS 258.A N GLY 281.A O no hydrogen 3.266 N/A ARG 259.A N ALA 279.A O no hydrogen 2.671 N/A ARG 259.A NH1 TRP 278.A O no hydrogen 3.425 N/A GLY 261.A N ILE 253.A O no hydrogen 2.973 N/A TYR 263.A N TYR 251.A O no hydrogen 2.879 N/A TYR 263.A OH ARG 259.A O no hydrogen 3.394 N/A LEU 265.A N LYS 249.A O no hydrogen 2.901 N/A GLY 268.A N TYR 251.A OH no hydrogen 3.330 N/A ARG 272.A N LEU 306.A O no hydrogen 3.229 N/A ARG 272.A NH2 GLU 303.A OE1 no hydrogen 2.708 N/A GLU 273.A N THR 270.A OG1 no hydrogen 3.287 N/A LEU 274.A N THR 270.A O no hydrogen 3.129 N/A ILE 275.A N PHE 271.A O no hydrogen 2.907 N/A TYR 276.A N ARG 272.A O no hydrogen 2.937 N/A GLU 277.A N GLU 273.A O no hydrogen 3.005 N/A ALA 279.A N LEU 274.A O no hydrogen 3.127 N/A GLY 281.A N ILE 275.A O no hydrogen 2.774 N/A LEU 283.A N PRO 256.A O no hydrogen 2.368 N/A GLN 287.A N ILE 330.A O no hydrogen 2.719 N/A GLN 287.A NE2 VAL 334.A O no hydrogen 2.259 N/A ALA 288.A N ILE 330.A O no hydrogen 3.008 N/A ILE 289.A N LEU 299.A O no hydrogen 3.307 N/A ILE 290.A N ILE 328.A O no hydrogen 2.906 N/A GLY 292.A N THR 296.A OG1 no hydrogen 3.078 N/A GLY 293.A N THR 296.A OG1 no hydrogen 3.420 N/A SER 295.A N GLU 96.A OE1 no hydrogen 3.397 N/A SER 295.A N GLU 96.A OE2 no hydrogen 3.257 N/A SER 295.A OG GLU 96.A OE1 no hydrogen 2.878 N/A SER 295.A OG GLU 96.A OE2 no hydrogen 3.233 N/A SER 295.A OG TYR 347.A OH no hydrogen 2.247 N/A LEU 299.A N ILE 289.A O no hydrogen 3.221 N/A VAL 305.A N THR 302.A O no hydrogen 3.036 N/A LEU 306.A N THR 302.A O no hydrogen 2.567 N/A ASP 307.A N GLU 303.A O no hydrogen 3.131 N/A THR 308.A N VAL 305.A O no hydrogen 2.913 N/A THR 308.A OG1 GLU 304.A O no hydrogen 3.434 N/A THR 308.A OG1 VAL 305.A O no hydrogen 2.775 N/A MET 310.A N THR 269.A O no hydrogen 3.365 N/A SER 311.A OG HIS 314.A ND1 no hydrogen 2.218 N/A TYR 312.A N SER 245.A OG no hydrogen 2.914 N/A TYR 312.A OH GLY 63.A O no hydrogen 2.914 N/A GLU 313.A N SER 311.A OG no hydrogen 3.242 N/A HIS 314.A N SER 311.A OG no hydrogen 3.005 N/A HIS 314.A ND1 SER 311.A OG no hydrogen 2.218 N/A ALA 317.A N GLU 313.A O no hydrogen 2.986 N/A LYS 318.A N LEU 315.A O no hydrogen 2.904 N/A GLY 319.A N GLN 316.A O no hydrogen 3.317 N/A SER 320.A OG PRO 297.A O no hydrogen 2.911 N/A THR 324.A N GLY 292.A O no hydrogen 3.245 N/A THR 324.A OG1 GLY 292.A O no hydrogen 2.483 N/A GLY 326.A N GLY 292.A O no hydrogen 2.516 N/A VAL 327.A N GLN 252.A O no hydrogen 2.852 N/A ILE 328.A N ILE 290.A O no hydrogen 2.973 N/A LEU 329.A N SER 254.A O no hydrogen 2.964 N/A ILE 330.A N ALA 288.A O no hydrogen 2.870 N/A GLU 332.A N PRO 285.A O no hydrogen 2.985 N/A ARG 333.A NH1 SER 434.A O no hydrogen 3.428 N/A VAL 334.A N PRO 331.A O no hydrogen 3.324 N/A VAL 337.A N SER 335.A OG no hydrogen 3.351 N/A ALA 339.A N SER 335.A O no hydrogen 3.181 N/A MET 340.A N MET 336.A O no hydrogen 2.960 N/A TRP 341.A N VAL 337.A O no hydrogen 2.811 N/A ASN 342.A N ASP 338.A O no hydrogen 2.987 N/A LEU 343.A N ALA 339.A O no hydrogen 2.949 N/A THR 344.A N MET 340.A O no hydrogen 2.857 N/A THR 344.A OG1 MET 340.A O no hydrogen 3.003 N/A THR 344.A OG1 TRP 341.A O no hydrogen 2.840 N/A ARG 345.A N TRP 341.A O no hydrogen 2.944 N/A PHE 346.A N ASN 342.A O no hydrogen 2.894 N/A TYR 347.A N LEU 343.A O no hydrogen 2.923 N/A TYR 347.A OH SER 295.A OG no hydrogen 2.247 N/A ALA 348.A N THR 344.A O no hydrogen 2.865 N/A HIS 349.A N ARG 345.A O no hydrogen 2.929 N/A GLU 350.A N TYR 347.A O no hydrogen 3.430 N/A CYS 352.A SG ASN 197.A OD1 no hydrogen 3.812 N/A LYS 354.A NZ PRO 198.A O no hydrogen 3.199 N/A CYS 358.A SG SER 351.A OG no hydrogen 2.794 N/A ARG 359.A N CYS 355.A O no hydrogen 3.105 N/A ARG 359.A NE GLU 360.A OE2 no hydrogen 3.515 N/A ARG 359.A NH1 GLY 353.A O no hydrogen 2.310 N/A ARG 359.A NH1 LYS 354.A O no hydrogen 3.524 N/A GLU 360.A N THR 356.A O no hydrogen 2.889 N/A GLY 361.A N PRO 357.A O no hydrogen 2.823 N/A VAL 362.A N CYS 358.A O no hydrogen 2.847 N/A ALA 363.A N ARG 359.A O no hydrogen 2.942 N/A GLY 364.A N GLU 360.A O no hydrogen 2.811 N/A PHE 365.A N GLU 360.A O no hydrogen 3.248 N/A PHE 365.A N GLY 361.A O no hydrogen 2.594 N/A MET 366.A N GLY 361.A O no hydrogen 2.506 N/A VAL 367.A N VAL 362.A O no hydrogen 3.221 N/A LEU 369.A N PHE 365.A O no hydrogen 2.686 N/A PHE 370.A N MET 366.A O no hydrogen 2.936 N/A ALA 371.A N VAL 367.A O no hydrogen 2.852 N/A LYS 372.A N ASN 368.A O no hydrogen 2.919 N/A ILE 373.A N LEU 369.A O no hydrogen 2.965 N/A GLY 374.A N PHE 370.A O no hydrogen 2.949 N/A THR 375.A N ALA 371.A O no hydrogen 2.913 N/A THR 375.A OG1 ALA 371.A O no hydrogen 2.209 N/A GLY 376.A N ILE 373.A O no hydrogen 3.461 N/A GLN 377.A N LYS 372.A O no hydrogen 3.018 N/A GLU 379.A N ASP 382.A OD2 no hydrogen 3.142 N/A LYS 381.A NZ GLU 379.A OE1 no hydrogen 2.712 N/A ASP 382.A N GLU 379.A O no hydrogen 2.996 N/A GLU 384.A N GLU 380.A O no hydrogen 2.902 N/A ASN 385.A N LYS 381.A O no hydrogen 2.869 N/A LEU 386.A N ASP 382.A O no hydrogen 2.828 N/A GLU 387.A N VAL 383.A O no hydrogen 2.883 N/A ALA 388.A N GLU 384.A O no hydrogen 2.961 N/A LEU 389.A N LEU 386.A O no hydrogen 3.050 N/A LEU 392.A N LEU 389.A O no hydrogen 3.103 N/A ILE 393.A N LEU 390.A O no hydrogen 2.860 N/A GLU 394.A N LEU 390.A O no hydrogen 2.935 N/A SER 397.A OG ARG 396.A O no hydrogen 2.795 N/A ALA 404.A N PRO 400.A O no hydrogen 2.794 N/A ALA 405.A N ALA 402.A O no hydrogen 2.918 N/A VAL 406.A N ASP 403.A O no hydrogen 3.011 N/A TRP 407.A N ASP 403.A O no hydrogen 3.061 N/A LYS 410.A N VAL 406.A O no hydrogen 2.270 N/A GLY 411.A N TRP 407.A O no hydrogen 2.943 N/A SER 412.A N PRO 408.A O no hydrogen 3.044 N/A SER 412.A OG VAL 409.A O no hydrogen 2.620 N/A SER 412.A OG TYR 420.A OH no hydrogen 3.007 N/A LEU 413.A N VAL 409.A O no hydrogen 2.858 N/A LEU 413.A N LYS 410.A O no hydrogen 2.956 N/A ARG 414.A N LYS 410.A O no hydrogen 3.009 N/A HIS 415.A N GLY 411.A O no hydrogen 2.993 N/A LYS 417.A N LEU 413.A O no hydrogen 2.647 N/A LYS 417.A NZ GLU 387.A OE2 no hydrogen 2.725 N/A TYR 420.A N PHE 416.A O no hydrogen 3.413 N/A TYR 420.A OH SER 412.A OG no hydrogen 3.007 N/A LEU 421.A N LYS 417.A O no hydrogen 2.973 N/A ALA 422.A N ASP 418.A O no hydrogen 2.998 N/A LEU 423.A N GLN 419.A O no hydrogen 3.072 N/A ALA 424.A N TYR 420.A O no hydrogen 2.473 N/A ARG 425.A N LEU 421.A O no hydrogen 2.429 N/A ARG 425.A NH2 GLU 380.A OE1 no hydrogen 2.418 N/A GLU 426.A N ALA 422.A O no hydrogen 2.521 N/A LYS 427.A N ALA 424.A O no hydrogen 3.231 N/A LYS 427.A NZ ALA 424.A O no hydrogen 2.169 N/A ARG 428.A NH1 GLU 426.A OE2 no hydrogen 3.193 N/A VAL 430.A N GLY 374.A O no hydrogen 2.615 N/A ARG 432.A NH1 ASP 338.A OD2 no hydrogen 2.771 N/A