Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 2is0_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): MET 8.A N PHE 5P.A O no hydrogen 2.944 N/A VAL 9.A N VAL 6P.A O no hydrogen 3.004 N/A ASP 10.A N SER 167.A OG no hydrogen 2.752 N/A ASN 11.A ND2 HIS 95.A O no hydrogen 2.897 N/A ASN 11.A ND2 MET 168.A O no hydrogen 3.063 N/A LEU 12.A N GLY 166.A O no hydrogen 2.993 N/A ARG 13.A N TYR 21.A O no hydrogen 3.134 N/A GLN 18.A NE2 ASN 117.A O no hydrogen 3.032 N/A TYR 20.A OH GLU 333.A OE1 no hydrogen 2.666 N/A TYR 21.A N ARG 13.A O no hydrogen 2.949 N/A VAL 22.A N ILE 35.A O no hydrogen 2.757 N/A MET 24.A N LEU 33.A O no hydrogen 2.846 N/A THR 25.A N SER 92.A O no hydrogen 2.988 N/A VAL 26.A N GLN 31.A O no hydrogen 2.782 N/A GLY 27.A N LEU 90.A O no hydrogen 2.991 N/A SER 28.A N SER 63.A OG no hydrogen 3.102 N/A SER 28.A OG THR 65.A OG1 no hydrogen 2.663 N/A GLN 31.A N VAL 26.A O no hydrogen 3.048 N/A GLN 31.A NE2 GLN 59.A O no hydrogen 2.975 N/A LEU 33.A N MET 24.A O no hydrogen 2.811 N/A ASN 34.A N GLU 122.A OE2 no hydrogen 2.852 N/A ILE 35.A N VAL 22.A O no hydrogen 2.749 N/A LEU 36.A N GLY 123.A O no hydrogen 2.842 N/A VAL 37.A N TYR 20.A O no hydrogen 2.875 N/A ASP 38.A N LEU 125.A O no hydrogen 3.110 N/A THR 39.A N SER 223.A OG no hydrogen 3.088 N/A THR 39.A OG1 VAL 221.A O no hydrogen 2.995 N/A GLY 40.A N ASP 38.A OD2 no hydrogen 2.853 N/A SER 41.A OG ASP 38.A OD2 no hydrogen 3.171 N/A SER 42.A OG TYR 129.A O no hydrogen 2.526 N/A ASN 43.A ND2 ARG 134.A O no hydrogen 2.847 N/A ALA 45.A N ILE 124.A O no hydrogen 2.962 N/A VAL 46.A N ALA 106.A O no hydrogen 2.959 N/A GLY 47.A N GLU 122.A O no hydrogen 2.768 N/A ALA 48.A N ILE 108.A O no hydrogen 2.689 N/A PHE 53.A N HIS 51.A ND1 no hydrogen 2.990 N/A LEU 54.A N HIS 51.A O no hydrogen 2.868 N/A ARG 56.A NE GLU 122.A OE1 no hydrogen 3.502 N/A TYR 58.A N GLY 47.A O no hydrogen 2.838 N/A TYR 58.A OH ASP 89.A OD2 no hydrogen 2.606 N/A GLN 59.A N GLN 31.A OE1 no hydrogen 2.955 N/A ARG 60.A NH1 GLU 85.A OE2 no hydrogen 2.870 N/A GLN 61.A N GLN 61.A OE1 no hydrogen 2.860 N/A LEU 62.A N GLN 59.A O no hydrogen 3.040 N/A SER 63.A N ARG 60.A O no hydrogen 3.178 N/A SER 63.A OG THR 65.A OG1 no hydrogen 3.331 N/A SER 63.A OG ASP 89.A OD1 no hydrogen 3.321 N/A SER 63.A OG ASP 89.A OD2 no hydrogen 2.643 N/A SER 64.A N SER 28.A O no hydrogen 2.790 N/A SER 64.A OG SER 28.A O no hydrogen 3.400 N/A THR 65.A OG1 SER 28.A OG no hydrogen 2.663 N/A THR 65.A OG1 SER 63.A OG no hydrogen 3.331 N/A THR 65.A OG1 ASP 89.A OD1 no hydrogen 2.625 N/A TYR 66.A N SER 63.A O no hydrogen 3.363 N/A ARG 67.A N THR 88.A O no hydrogen 2.856 N/A LEU 69.A N LEU 86.A O no hydrogen 2.914 N/A ARG 70.A N ASP 68.A OD1 no hydrogen 2.786 N/A VAL 73.A N GLY 84.A O no hydrogen 2.981 N/A VAL 75.A N TRP 82.A O no hydrogen 2.987 N/A TYR 77.A N GLY 80.A O no hydrogen 2.967 N/A ALA 81.A N ASP 112.A O no hydrogen 3.033 N/A TRP 82.A N VAL 75.A O no hydrogen 3.109 N/A TRP 82.A NE1 TYR 77.A OH no hydrogen 3.104 N/A ALA 83.A N GLU 110.A O no hydrogen 2.837 N/A GLY 84.A N VAL 73.A O no hydrogen 2.955 N/A GLU 85.A N ALA 107.A O no hydrogen 3.035 N/A LEU 86.A N LYS 71.A O no hydrogen 2.799 N/A GLY 87.A N ILE 105.A O no hydrogen 3.023 N/A THR 88.A N ARG 67.A O no hydrogen 2.846 N/A ASP 89.A N ALA 103.A O no hydrogen 3.207 N/A LEU 90.A N ASP 89.A OD1 no hydrogen 2.790 N/A VAL 91.A N VAL 101.A O no hydrogen 2.773 N/A SER 92.A N THR 25.A O no hydrogen 3.134 N/A SER 92.A OG VAL 99.A O no hydrogen 3.302 N/A SER 92.A OG THR 100.A OG1 no hydrogen 2.687 N/A GLY 96.A N ILE 93.A O no hydrogen 2.721 N/A THR 100.A OG1 SER 92.A OG no hydrogen 2.687 N/A VAL 101.A N VAL 91.A O no hydrogen 3.047 N/A ARG 102.A N GLN 149.A OE1 no hydrogen 2.909 N/A ARG 102.A NH1 THR 65.A O no hydrogen 3.200 N/A ARG 102.A NH1 THR 88.A OG1 no hydrogen 3.016 N/A ARG 102.A NH2 THR 65.A O no hydrogen 3.025 N/A ALA 103.A N ASP 89.A O no hydrogen 3.023 N/A ASN 104.A ND2 GLU 140.A O no hydrogen 2.971 N/A ILE 105.A N GLY 87.A O no hydrogen 2.791 N/A ALA 106.A N PHE 44.A O no hydrogen 2.971 N/A ALA 107.A N GLU 85.A O no hydrogen 2.892 N/A ILE 108.A N VAL 46.A O no hydrogen 2.788 N/A THR 109.A N ALA 83.A O no hydrogen 3.127 N/A GLU 110.A N ALA 83.A O no hydrogen 3.377 N/A ASP 112.A N ALA 81.A O no hydrogen 2.905 N/A SER 119.A N ILE 116.A O no hydrogen 2.970 N/A SER 119.A OG ILE 116.A O no hydrogen 2.834 N/A ASN 120.A ND2 TYR 21.A OH no hydrogen 2.840 N/A TRP 121.A NE1 GLN 18.A O no hydrogen 2.860 N/A GLU 122.A N ASN 34.A O no hydrogen 2.787 N/A ILE 124.A N ALA 45.A O no hydrogen 2.660 N/A LEU 125.A N LEU 36.A O no hydrogen 2.728 N/A GLY 126.A N ASN 43.A O no hydrogen 2.938 N/A LEU 127.A N ASP 38.A O no hydrogen 2.773 N/A ALA 128.A N SER 41.A O no hydrogen 2.719 N/A TYR 129.A N TRP 191.A O no hydrogen 3.089 N/A ILE 132.A N TYR 129.A O no hydrogen 3.361 N/A ALA 133.A N ALA 130.A O no hydrogen 2.968 N/A ARG 134.A N ASN 43.A OD1 no hydrogen 3.075 N/A SER 138.A N ASP 136.A OD2 no hydrogen 2.735 N/A SER 138.A OG ASP 136.A OD2 no hydrogen 2.419 N/A LEU 139.A N ASP 136.A O no hydrogen 3.155 N/A SER 145.A N PRO 141.A O no hydrogen 3.156 N/A SER 145.A OG GLU 140.A OE2 no hydrogen 2.517 N/A SER 145.A OG PRO 141.A O no hydrogen 3.464 N/A LEU 146.A N PHE 142.A O no hydrogen 2.919 N/A VAL 147.A N PHE 143.A O no hydrogen 2.984 N/A LYS 148.A N ASP 144.A O no hydrogen 2.973 N/A LYS 148.A NZ GLU 140.A OE1 no hydrogen 2.753 N/A GLN 149.A N SER 145.A O no hydrogen 2.937 N/A GLN 149.A NE2 ARG 102.A O no hydrogen 2.958 N/A THR 150.A N LEU 146.A O no hydrogen 3.015 N/A THR 150.A OG1 LEU 146.A O no hydrogen 2.650 N/A VAL 152.A N THR 150.A OG1 no hydrogen 3.192 N/A LEU 155.A N PRO 153.A O no hydrogen 2.773 N/A PHE 156.A N PHE 339.A O no hydrogen 3.349 N/A SER 157.A N ILE 169.A O no hydrogen 2.836 N/A SER 157.A OG ILE 169.A O no hydrogen 3.533 N/A SER 157.A OG GLY 172.A O no hydrogen 3.136 N/A SER 157.A OG TYR 336.A OH no hydrogen 2.638 N/A LEU 158.A N VAL 337.A O no hydrogen 2.768 N/A GLN 159.A N SER 167.A O no hydrogen 2.916 N/A GLN 159.A NE2 LEU 177.A O no hydrogen 2.992 N/A CYS 161.A N GLY 165.A O no hydrogen 2.960 N/A CYS 161.A SG GLN 159.A OE1 no hydrogen 3.463 N/A SER 167.A N GLN 159.A O no hydrogen 2.893 N/A MET 168.A N ASN 11.A OD1 no hydrogen 2.807 N/A ILE 169.A N SER 157.A O no hydrogen 2.941 N/A GLY 171.A N LEU 155.A O no hydrogen 2.664 N/A ASP 174.A N TYR 336.A OH no hydrogen 2.930 N/A SER 176.A N ASP 174.A OD2 no hydrogen 3.061 N/A SER 176.A OG ASP 174.A OD2 no hydrogen 2.398 N/A LEU 177.A N ASP 174.A O no hydrogen 3.180 N/A TYR 178.A OH HIS 175.A ND1 no hydrogen 2.882 N/A THR 179.A N VAL 350.A O no hydrogen 3.000 N/A TRP 183.A N PHE 348.A O no hydrogen 2.829 N/A THR 185.A N ILE 346.A O no hydrogen 2.804 N/A THR 185.A OG1 MET 282.A O no hydrogen 2.719 N/A ILE 187.A N LYS 344.A O no hydrogen 2.996 N/A ARG 188.A N GLU 194.A O no hydrogen 2.849 N/A ARG 188.A NH1 GLU 194.A OE2 no hydrogen 3.005 N/A ARG 188.A NH1 TYR 378.A O no hydrogen 2.888 N/A ARG 188.A NH2 TYR 378.A O no hydrogen 3.053 N/A TRP 191.A N ARG 189.A O no hydrogen 3.101 N/A TRP 191.A N TYR 192.A O no hydrogen 3.319 N/A TRP 191.A NE1 GLU 194.A OE1 no hydrogen 2.910 N/A TYR 193.A OH LEU 127.A O no hydrogen 2.656 N/A VAL 195.A N SER 219.A O no hydrogen 2.880 N/A ILE 197.A N ASN 215.A OD1 no hydrogen 2.759 N/A VAL 198.A N TYR 280.A O no hydrogen 2.829 N/A ARG 199.A NE GLU 201.A OE2 no hydrogen 2.819 N/A ARG 199.A NH2 GLU 201.A OE2 no hydrogen 3.166 N/A GLU 201.A N SER 278.A O no hydrogen 2.926 N/A ILE 202.A N GLN 205.A O no hydrogen 2.838 N/A ASN 203.A N VAL 276.A O no hydrogen 2.949 N/A GLN 205.A N ILE 202.A O no hydrogen 2.855 N/A LEU 207.A N VAL 200.A O no hydrogen 2.889 N/A LYS 208.A N ASP 206.A OD1 no hydrogen 2.938 N/A LYS 212.A N ASP 210.A OD1 no hydrogen 2.830 N/A GLU 213.A N ASP 210.A O no hydrogen 2.981 N/A TYR 214.A N CYS 211.A O no hydrogen 3.067 N/A ASN 215.A ND2 ILE 197.A O no hydrogen 2.872 N/A ASN 215.A ND2 CYS 376.A O no hydrogen 3.379 N/A TYR 216.A N GLU 213.A O no hydrogen 3.336 N/A LYS 218.A NZ ASP 217.A OD1 no hydrogen 3.006 N/A LYS 218.A NZ THR 323.A O no hydrogen 2.769 N/A SER 219.A OG ASN 215.A OD1 no hydrogen 2.734 N/A ILE 220.A N THR 325.A O no hydrogen 2.972 N/A VAL 221.A N TYR 193.A O no hydrogen 3.145 N/A ASP 222.A N MET 327.A O no hydrogen 3.066 N/A SER 223.A N THR 39.A OG1 no hydrogen 3.027 N/A SER 223.A OG VAL 37.A O no hydrogen 2.821 N/A GLY 224.A N ASP 222.A OD1 no hydrogen 2.851 N/A THR 225.A N ASP 222.A O no hydrogen 3.140 N/A THR 225.A OG1 ASP 222.A OD2 no hydrogen 2.627 N/A ASN 227.A ND2 SER 319.A OG no hydrogen 3.041 N/A LEU 228.A N ALA 317.A O no hydrogen 3.174 N/A ARG 229.A N VAL 326.A O no hydrogen 2.861 N/A ARG 229.A NH2 GLN 320.A O no hydrogen 3.468 N/A LEU 230.A N SER 319.A O no hydrogen 2.895 N/A LYS 232.A NZ GLU 236.A OE2 no hydrogen 2.884 N/A LYS 232.A NZ GLN 320.A OE1 no hydrogen 2.800 N/A PHE 235.A N PRO 231.A O no hydrogen 2.857 N/A GLU 236.A N LYS 232.A O no hydrogen 3.016 N/A ALA 237.A N LYS 233.A O no hydrogen 3.126 N/A ALA 238.A N VAL 234.A O no hydrogen 2.839 N/A VAL 239.A N PHE 235.A O no hydrogen 2.885 N/A LYS 240.A N GLU 236.A O no hydrogen 3.166 N/A LYS 240.A NZ GLU 236.A O no hydrogen 2.876 N/A LYS 240.A NZ GLU 236.A OE1 no hydrogen 2.858 N/A SER 241.A N ALA 237.A O no hydrogen 3.155 N/A SER 241.A OG GLN 205.A OE1 no hydrogen 3.556 N/A ILE 242.A N ALA 238.A O no hydrogen 2.910 N/A LYS 243.A N VAL 239.A O no hydrogen 2.912 N/A ALA 244.A N LYS 240.A O no hydrogen 3.010 N/A ALA 245.A N SER 241.A O no hydrogen 2.936 N/A SER 246.A N LYS 243.A O no hydrogen 3.070 N/A SER 246.A OG ILE 242.A O no hydrogen 2.835 N/A SER 246.A OG LYS 243.A O no hydrogen 3.336 N/A SER 247.A OG ALA 244.A O no hydrogen 3.353 N/A GLU 249.A N SER 246.A O no hydrogen 3.344 N/A LYS 250.A NZ SER 247.A O no hydrogen 2.980 N/A PHE 255.A N PRO 252.A O no hydrogen 2.974 N/A LEU 257.A N GLY 254.A O no hydrogen 3.273 N/A GLY 258.A N PHE 255.A O no hydrogen 3.049 N/A GLU 259.A N GLY 254.A O no hydrogen 2.847 N/A GLN 260.A N GLY 254.A O no hydrogen 3.013 N/A VAL 262.A N TYR 314.A O no hydrogen 3.228 N/A TRP 264.A N ASP 312.A O no hydrogen 2.919 N/A ALA 266.A N GLN 310.A O no hydrogen 2.929 N/A GLY 267.A N ASP 312.A OD1 no hydrogen 3.101 N/A THR 268.A N GLN 265.A O no hydrogen 2.882 N/A THR 268.A OG1 GLN 265.A O no hydrogen 2.472 N/A THR 269.A OG1 TYR 314.A OH no hydrogen 2.928 N/A TRP 271.A N THR 269.A O no hydrogen 2.866 N/A ILE 273.A N PRO 270.A O no hydrogen 2.918 N/A PHE 274.A N TRP 271.A O no hydrogen 3.093 N/A VAL 276.A N ASN 203.A OD1 no hydrogen 3.024 N/A ILE 277.A N ILE 294.A O no hydrogen 2.982 N/A SER 278.A N GLU 201.A O no hydrogen 2.886 N/A SER 278.A OG THR 293.A OG1 no hydrogen 2.494 N/A LEU 279.A N ILE 292.A O no hydrogen 2.900 N/A TYR 280.A N ARG 199.A O no hydrogen 2.791 N/A TYR 280.A OH GLU 201.A OE1 no hydrogen 2.894 N/A TYR 280.A OH GLU 201.A OE2 no hydrogen 3.066 N/A LEU 281.A N PHE 290.A O no hydrogen 2.755 N/A MET 282.A N ILE 196.A O no hydrogen 3.103 N/A GLY 283.A N GLN 288.A O no hydrogen 2.762 N/A VAL 285.A N GLN 288.A OE1 no hydrogen 3.117 N/A GLN 288.A N VAL 285.A O no hydrogen 3.033 N/A GLN 288.A NE2 SER 289.A O no hydrogen 3.136 N/A SER 289.A N PHE 368.A O no hydrogen 3.028 N/A SER 289.A OG THR 370.A OG1 no hydrogen 2.857 N/A PHE 290.A N LEU 281.A O no hydrogen 3.184 N/A ARG 291.A N GLU 365.A O no hydrogen 2.789 N/A ARG 291.A NE GLU 365.A OE2 no hydrogen 3.072 N/A ARG 291.A NH1 TYR 280.A OH no hydrogen 2.844 N/A ARG 291.A NH2 GLU 365.A OE2 no hydrogen 2.854 N/A ILE 292.A N LEU 279.A O no hydrogen 2.908 N/A THR 293.A N ALA 363.A O no hydrogen 2.675 N/A THR 293.A OG1 SER 278.A OG no hydrogen 2.494 N/A ILE 294.A N ILE 277.A O no hydrogen 2.883 N/A GLN 297.A N GLN 297.A OE1 no hydrogen 2.980 N/A GLN 297.A NE2 ASP 357.A OD2 no hydrogen 2.859 N/A GLN 298.A N LEU 295.A O no hydrogen 2.909 N/A TYR 299.A N LEU 295.A O no hydrogen 3.411 N/A TYR 299.A OH PRO 275.A O no hydrogen 2.618 N/A LEU 300.A N PRO 296.A O no hydrogen 2.845 N/A ARG 301.A N LYS 315.A O no hydrogen 3.021 N/A VAL 303.A N CYS 313.A O no hydrogen 2.927 N/A ALA 307.A N ASP 305.A OD1 no hydrogen 3.503 N/A THR 308.A OG1 ALA 307.A O no hydrogen 2.389 N/A SER 309.A N ASP 305.A OD1 no hydrogen 2.909 N/A SER 309.A OG ASP 305.A OD1 no hydrogen 2.520 N/A ASP 312.A N TRP 264.A O no hydrogen 2.853 N/A TYR 314.A N VAL 262.A O no hydrogen 2.866 N/A TYR 314.A OH THR 269.A OG1 no hydrogen 2.928 N/A LYS 315.A N ARG 301.A O no hydrogen 2.924 N/A ALA 317.A N TYR 299.A O no hydrogen 2.715 N/A SER 319.A N LEU 228.A O no hydrogen 3.121 N/A SER 321.A N LEU 230.A O no hydrogen 2.809 N/A SER 321.A OG THR 323.A OG1 no hydrogen 3.314 N/A SER 321.A OG GLY 324.A O no hydrogen 2.857 N/A THR 323.A N SER 321.A OG no hydrogen 2.992 N/A THR 323.A OG1 SER 321.A OG no hydrogen 3.314 N/A THR 325.A N LYS 218.A O no hydrogen 2.754 N/A THR 325.A OG1 TYR 214.A O no hydrogen 2.667 N/A VAL 326.A N ARG 229.A O no hydrogen 2.885 N/A MET 327.A N ILE 220.A O no hydrogen 2.846 N/A GLY 328.A N ASN 227.A O no hydrogen 3.025 N/A ALA 329.A N THR 225.A O no hydrogen 2.857 N/A VAL 330.A N THR 226.A O no hydrogen 3.142 N/A ILE 331.A N GLY 328.A O no hydrogen 2.839 N/A MET 332.A N GLY 328.A O no hydrogen 3.072 N/A GLU 333.A N ALA 329.A O no hydrogen 2.805 N/A GLY 334.A N ILE 331.A O no hydrogen 3.187 N/A PHE 335.A N MET 332.A O no hydrogen 2.902 N/A TYR 336.A N ALA 349.A O no hydrogen 2.957 N/A TYR 336.A OH SER 157.A OG no hydrogen 2.638 N/A VAL 337.A N LEU 158.A O no hydrogen 2.857 N/A VAL 338.A N GLY 347.A O no hydrogen 2.830 N/A PHE 339.A N PHE 156.A O no hydrogen 2.825 N/A ASP 340.A N ARG 345.A O no hydrogen 2.852 N/A ARG 341.A N PHE 339.A O no hydrogen 3.012 N/A ARG 341.A NE ASN 154.A OD1 no hydrogen 2.780 N/A ARG 341.A NH1 TYR 193.A OH no hydrogen 2.975 N/A ARG 341.A NH2 ASP 144.A OD2 no hydrogen 2.748 N/A ALA 342.A N ASN 154.A O no hydrogen 2.951 N/A ARG 343.A N ASP 340.A OD1 no hydrogen 3.090 N/A LYS 344.A N ARG 341.A O no hydrogen 3.105 N/A ARG 345.A N ASP 340.A O no hydrogen 3.000 N/A ARG 345.A NE ASP 340.A OD2 no hydrogen 2.911 N/A ARG 345.A NH1 GLU 284.A OE1 no hydrogen 2.792 N/A ARG 345.A NH2 ASP 340.A OD2 no hydrogen 3.424 N/A ILE 346.A N THR 185.A O no hydrogen 2.842 N/A GLY 347.A N VAL 338.A O no hydrogen 2.787 N/A PHE 348.A N TRP 183.A O no hydrogen 2.781 N/A ALA 349.A N TYR 336.A O no hydrogen 3.304 N/A SER 351.A N GLY 334.A O no hydrogen 3.359 N/A ALA 352.A N LEU 177.A O no hydrogen 3.033 N/A CYS 353.A N SER 351.A OG no hydrogen 3.158 N/A CYS 353.A SG SER 351.A OG no hydrogen 3.244 N/A HIS 354.A N SER 351.A O no hydrogen 3.486 N/A HIS 354.A ND1 SER 351.A O no hydrogen 2.899 N/A HIS 356.A ND1 HIS 354.A O no hydrogen 3.218 N/A ASP 357.A N ARG 360.A O no hydrogen 3.409 N/A PHE 359.A N ASP 357.A OD1 no hydrogen 2.777 N/A ARG 360.A N ASP 357.A OD1 no hydrogen 2.766 N/A ARG 360.A NH1 PHE 274.A O no hydrogen 2.930 N/A ARG 360.A NH2 PHE 274.A O no hydrogen 2.910 N/A THR 361.A OG1 HIS 354.A NE2 no hydrogen 2.989 N/A THR 361.A OG1 ALA 362.A O no hydrogen 3.063 N/A ALA 362.A N HIS 354.A NE2 no hydrogen 3.059 N/A ALA 363.A N THR 293.A O no hydrogen 2.903 N/A GLU 365.A N ARG 291.A O no hydrogen 2.827 N/A PHE 368.A N SER 289.A O no hydrogen 3.004 N/A THR 370.A N ASN 287.A O no hydrogen 2.957 N/A THR 370.A OG1 SER 289.A OG no hydrogen 2.857 N/A ASP 375.A N ASP 372.A O no hydrogen 2.916 N/A CYS 376.A N MET 373.A O no hydrogen 3.065 N/A CYS 376.A SG MET 373.A O no hydrogen 3.348 N/A GLY 377.A N GLU 374.A O no hydrogen 3.491 N/A