Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 3pu8_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): ASN 2.A N SER 209.A O no hydrogen 2.700 N/A ASN 2.A ND2 ASP 165.A OD2 no hydrogen 2.931 N/A ASN 2.A ND2 MET 211.A O no hydrogen 3.277 N/A SER 4.A N GLN 1.A O no hydrogen 3.023 N/A SER 4.A OG GLN 1.A O no hydrogen 2.993 N/A PHE 7.A N SER 4.A OG no hydrogen 3.286 N/A ILE 8.A N SER 4.A O no hydrogen 3.075 N/A LYS 9.A N GLN 5.A O no hydrogen 3.048 N/A GLU 10.A N LEU 6.A O no hydrogen 2.803 N/A LEU 11.A N PHE 7.A O no hydrogen 2.669 N/A ARG 12.A N ILE 8.A O no hydrogen 2.786 N/A ARG 12.A NH2 PRO 244.A O no hydrogen 3.430 N/A SER 13.A N LYS 9.A O no hydrogen 3.328 N/A SER 13.A N GLU 10.A O no hydrogen 3.101 N/A SER 13.A OG GLU 10.A O no hydrogen 3.077 N/A ARG 14.A N LEU 11.A O no hydrogen 2.995 N/A ARG 14.A NH1 ASP 215.A OD1 no hydrogen 2.903 N/A ARG 14.A NH2 ASP 215.A OD1 no hydrogen 2.470 N/A ALA 19.A N LYS 222.A O no hydrogen 3.179 N/A GLU 20.A N SER 18.A OG no hydrogen 2.959 N/A VAL 22.A N ALA 19.A O no hydrogen 3.021 N/A VAL 23.A N ALA 19.A O no hydrogen 2.781 N/A ALA 24.A N PRO 44.A O no hydrogen 3.348 N/A VAL 26.A N LEU 46.A O no hydrogen 2.963 N/A GLN 30.A N PRO 27.A O no hydrogen 2.880 N/A GLN 30.A NE2 SER 29.A OG no hydrogen 3.356 N/A LEU 31.A N GLY 28.A O no hydrogen 3.231 N/A THR 32.A OG1 GLN 30.A O no hydrogen 3.518 N/A TYR 35.A N THR 32.A OG1 no hydrogen 3.152 N/A MET 36.A N THR 32.A O no hydrogen 3.117 N/A GLU 37.A N LEU 33.A O no hydrogen 2.878 N/A GLU 38.A N GLY 34.A O no hydrogen 2.764 N/A HIS 39.A N TYR 35.A O no hydrogen 2.918 N/A HIS 39.A ND1 TYR 35.A O no hydrogen 3.105 N/A GLY 40.A N MET 36.A O no hydrogen 2.594 N/A ILE 45.A N PHE 232.A O no hydrogen 2.947 N/A LEU 46.A N ALA 24.A O no hydrogen 2.799 N/A VAL 47.A N THR 230.A O no hydrogen 2.809 N/A LEU 53.A N LYS 50.A O no hydrogen 2.967 N/A ALA 56.A N GLU 125.A O no hydrogen 2.966 N/A TYR 63.A N ASP 66.A OD2 no hydrogen 2.739 N/A SER 65.A N TYR 100.A OH no hydrogen 3.013 N/A VAL 67.A N TYR 63.A O no hydrogen 2.961 N/A GLU 68.A N VAL 64.A O no hydrogen 3.007 N/A ASN 69.A N SER 65.A O no hydrogen 3.251 N/A TYR 70.A N ASP 66.A O no hydrogen 3.024 N/A VAL 71.A N VAL 67.A O no hydrogen 2.855 N/A GLY 72.A N GLU 68.A O no hydrogen 2.911 N/A ARG 75.A N GLY 72.A O no hydrogen 3.165 N/A ARG 75.A NH1 GLU 114.A O no hydrogen 3.556 N/A ARG 75.A NH1 ASP 117.A OD1 no hydrogen 3.405 N/A ARG 75.A NH2 GLU 114.A O no hydrogen 2.874 N/A VAL 77.A N MET 90.A O no hydrogen 2.938 N/A VAL 79.A N CYS 88.A O no hydrogen 2.746 N/A THR 80.A N ASN 109.A O no hydrogen 2.818 N/A THR 80.A OG1 ASP 87.A OD1 no hydrogen 3.228 N/A ASP 81.A N LYS 86.A O no hydrogen 3.041 N/A VAL 82.A N VAL 107.A O no hydrogen 2.834 N/A THR 83.A OG1 ASP 81.A OD1 no hydrogen 2.758 N/A LYS 84.A N ASP 81.A OD1 no hydrogen 3.447 N/A GLN 85.A N ASP 81.A O no hydrogen 2.736 N/A GLN 85.A N VAL 82.A O no hydrogen 3.228 N/A GLN 85.A NE2 ASN 2.A O no hydrogen 3.073 N/A GLN 85.A NE2 VAL 82.A O no hydrogen 2.981 N/A CYS 88.A N VAL 79.A O no hydrogen 2.879 N/A CYS 88.A SG VAL 79.A O no hydrogen 3.915 N/A LYS 89.A NZ ASP 78.A OD1 no hydrogen 3.171 N/A MET 90.A N VAL 77.A O no hydrogen 3.225 N/A LYS 91.A N GLU 94.A OE1 no hydrogen 3.217 N/A LEU 92.A N ARG 75.A O no hydrogen 2.908 N/A LYS 93.A N PRO 73.A O no hydrogen 3.017 N/A LYS 93.A NZ GLU 74.A OE2 no hydrogen 2.765 N/A PHE 95.A N LYS 91.A O no hydrogen 3.212 N/A VAL 96.A N LEU 92.A O no hydrogen 2.770 N/A ASP 97.A N LYS 93.A O no hydrogen 2.900 N/A TYR 98.A N GLU 94.A O no hydrogen 3.200 N/A TYR 98.A OH ARG 106.A O no hydrogen 2.799 N/A TYR 99.A N PHE 95.A O no hydrogen 2.803 N/A TYR 100.A N VAL 96.A O no hydrogen 3.041 N/A SER 101.A N TYR 98.A O no hydrogen 3.059 N/A ARG 104.A NE TYR 99.A O no hydrogen 3.042 N/A ARG 104.A NH1 ASP 246.A OD1 no hydrogen 2.702 N/A ARG 104.A NH1 ASP 246.A OD2 no hydrogen 3.101 N/A ARG 104.A NH2 TYR 99.A O no hydrogen 2.851 N/A ARG 104.A NH2 ASP 246.A OD2 no hydrogen 2.599 N/A ARG 106.A NH1 ASP 81.A OD2 no hydrogen 3.061 N/A LEU 108.A N TYR 98.A OH no hydrogen 3.022 N/A ASN 109.A N THR 80.A O no hydrogen 3.013 N/A ASN 109.A ND2 SER 162.A OG no hydrogen 3.340 N/A VAL 110.A N ILE 157.A O no hydrogen 3.002 N/A ASN 112.A ND2 ASP 78.A OD2 no hydrogen 2.847 N/A ASN 112.A ND2 LEU 278.A O no hydrogen 3.166 N/A PHE 115.A N LYS 153.A O no hydrogen 2.932 N/A SER 116.A N GLU 114.A OE1 no hydrogen 2.894 N/A SER 116.A OG GLU 114.A OE1 no hydrogen 2.632 N/A SER 116.A OG GLU 114.A OE2 no hydrogen 3.296 N/A THR 118.A N PHE 115.A O no hydrogen 3.057 N/A THR 118.A OG1 PHE 115.A O no hydrogen 2.874 N/A ARG 119.A NH2 ASN 69.A O no hydrogen 3.019 N/A MET 120.A N THR 118.A OG1 no hydrogen 3.071 N/A SER 121.A N THR 118.A O no hydrogen 3.068 N/A SER 121.A OG SER 116.A O no hydrogen 3.360 N/A SER 122.A OG ARG 119.A O no hydrogen 3.250 N/A PHE 123.A N MET 120.A O no hydrogen 2.973 N/A VAL 124.A N SER 121.A O no hydrogen 3.234 N/A GLU 125.A N ALA 56.A O no hydrogen 2.801 N/A ASP 128.A N LEU 53.A O no hydrogen 2.828 N/A LYS 131.A N PRO 127.A O no hydrogen 3.390 N/A LYS 131.A NZ GLU 125.A OE1 no hydrogen 3.392 N/A LYS 132.A N ASP 128.A O no hydrogen 2.926 N/A LEU 133.A N ILE 129.A O no hydrogen 3.000 N/A LEU 133.A N VAL 130.A O no hydrogen 3.191 N/A SER 134.A N VAL 130.A O no hydrogen 2.822 N/A TRP 135.A N LEU 255.A O no hydrogen 2.977 N/A TRP 135.A NE1 SER 257.A OG no hydrogen 3.029 N/A GLU 137.A N SER 134.A OG no hydrogen 3.134 N/A ASN 138.A N SER 134.A O no hydrogen 3.073 N/A ASN 138.A N TRP 135.A O no hydrogen 3.209 N/A ASN 138.A ND2 LYS 131.A O no hydrogen 3.054 N/A ASN 138.A ND2 LYS 132.A O no hydrogen 3.159 N/A ASN 138.A ND2 SER 134.A O no hydrogen 2.819 N/A TYR 139.A N TRP 135.A O no hydrogen 2.833 N/A TRP 140.A N VAL 136.A O no hydrogen 3.151 N/A ALA 144.A N PRO 141.A O no hydrogen 3.131 N/A LEU 145.A N GLU 342.A OE2 no hydrogen 3.050 N/A LYS 148.A NZ ASP 142.A OD1 no hydrogen 3.179 N/A LYS 150.A NZ GLU 114.A OE1 no hydrogen 2.831 N/A LYS 150.A NZ ASP 117.A OD1 no hydrogen 2.870 N/A VAL 151.A N PRO 149.A O no hydrogen 3.031 N/A LYS 153.A N GLU 114.A OE2 no hydrogen 2.933 N/A LYS 153.A NZ SER 121.A O no hydrogen 2.831 N/A LYS 153.A NZ SER 121.A OG no hydrogen 2.832 N/A LYS 153.A NZ VAL 124.A O no hydrogen 2.968 N/A TYR 154.A N ALA 251.A O no hydrogen 2.683 N/A CYS 155.A N LEU 113.A O no hydrogen 2.934 N/A LEU 156.A N ALA 249.A O no hydrogen 2.754 N/A ILE 157.A N VAL 110.A O no hydrogen 2.963 N/A CYS 158.A N CYS 247.A O no hydrogen 3.033 N/A LYS 160.A N ASP 246.A OD1 no hydrogen 2.841 N/A LYS 160.A NZ ASP 161.A OD2 no hydrogen 2.994 N/A ASP 161.A N THR 243.A O no hydrogen 2.739 N/A SER 162.A OG VAL 159.A O no hydrogen 2.955 N/A SER 162.A OG THR 243.A OG1 no hydrogen 3.165 N/A TYR 163.A OH ASP 165.A OD1 no hydrogen 2.641 N/A THR 164.A N THR 241.A O no hydrogen 2.874 N/A PHE 166.A N ASP 165.A OD1 no hydrogen 2.834 N/A HIS 167.A N TYR 239.A O no hydrogen 3.014 N/A HIS 167.A ND1 ASP 165.A O no hydrogen 2.884 N/A ILE 168.A N TYR 199.A OH no hydrogen 3.190 N/A SER 170.A OG GLU 270.A OE2 no hydrogen 2.860 N/A GLY 171.A N GLU 270.A OE1 no hydrogen 2.606 N/A GLY 172.A N ASP 169.A O no hydrogen 3.130 N/A ALA 173.A N SER 170.A O no hydrogen 3.302 N/A SER 174.A N PHE 254.A O no hydrogen 2.883 N/A SER 174.A OG HIS 256.A NE2 no hydrogen 2.933 N/A ALA 175.A N ILE 233.A O no hydrogen 2.947 N/A TRP 176.A N GLY 252.A O no hydrogen 3.099 N/A TYR 177.A N LEU 231.A O no hydrogen 2.859 N/A HIS 178.A N PHE 250.A O no hydrogen 2.753 N/A HIS 178.A ND1 THR 230.A OG1 no hydrogen 2.880 N/A VAL 179.A N GLN 229.A O no hydrogen 3.163 N/A LEU 180.A N LEU 248.A O no hydrogen 2.845 N/A LYS 181.A N LEU 248.A O no hydrogen 3.119 N/A LYS 181.A NZ PHE 62.A O no hydrogen 3.129 N/A LYS 184.A N VAL 225.A O no hydrogen 2.932 N/A LYS 184.A NZ THR 243.A OG1 no hydrogen 3.061 N/A THR 185.A N LEU 242.A O no hydrogen 2.908 N/A PHE 186.A N CYS 223.A O no hydrogen 2.811 N/A TYR 187.A N ALA 240.A O no hydrogen 2.910 N/A LEU 188.A N TYR 221.A O no hydrogen 2.727 N/A ILE 189.A N ILE 238.A O no hydrogen 2.818 N/A ARG 190.A NH2.A GLU 43.A OE2 no hydrogen 2.662 N/A ALA 192.A N ARG 190.A O no hydrogen 2.737 N/A ASN 195.A ND2 ARG 190.A O no hydrogen 2.963 N/A ILE 196.A N ALA 192.A O no hydrogen 3.057 N/A SER 197.A N SER 193.A O no hydrogen 3.155 N/A SER 197.A OG SER 193.A O no hydrogen 3.471 N/A LEU 198.A N ALA 194.A O no hydrogen 2.940 N/A TYR 199.A N ASN 195.A O no hydrogen 2.795 N/A GLU 200.A N ILE 196.A O no hydrogen 2.935 N/A ARG 201.A N SER 197.A O no hydrogen 3.093 N/A TRP 202.A N LEU 198.A O no hydrogen 2.853 N/A TRP 202.A NE1 HIS 208.A O no hydrogen 3.155 N/A TRP 202.A NE1 MET 211.A O no hydrogen 3.069 N/A ARG 203.A N TYR 199.A O no hydrogen 2.841 N/A ARG 203.A NH1.A ARG 203.A O no hydrogen 3.116 N/A SER 204.A N GLU 200.A O no hydrogen 3.104 N/A SER 204.A OG GLU 200.A O no hydrogen 3.267 N/A SER 204.A OG ARG 201.A O no hydrogen 3.114 N/A ALA 205.A N TRP 202.A O no hydrogen 3.131 N/A HIS 208.A N ALA 205.A O no hydrogen 3.025 N/A HIS 208.A ND1 ALA 205.A O no hydrogen 3.108 N/A GLU 210.A N ASN 207.A O no hydrogen 2.998 N/A MET 211.A N HIS 208.A O no hydrogen 2.913 N/A ASP 215.A N PHE 212.A O no hydrogen 3.120 N/A GLN 216.A N PHE 213.A O no hydrogen 2.786 N/A VAL 217.A N ALA 214.A O no hydrogen 3.380 N/A LYS 219.A NZ ASP 218.A OD2 no hydrogen 3.301 N/A TYR 221.A N LEU 188.A O no hydrogen 2.764 N/A LYS 222.A N PRO 17.A O no hydrogen 3.060 N/A CYS 223.A N PHE 186.A O no hydrogen 2.807 N/A VAL 225.A N LYS 184.A O no hydrogen 2.747 N/A LYS 226.A N GLN 229.A OE1 no hydrogen 2.979 N/A GLY 228.A N VAL 179.A O no hydrogen 2.782 N/A GLN 229.A N LYS 226.A O no hydrogen 2.972 N/A THR 230.A N VAL 47.A O no hydrogen 3.118 N/A THR 230.A OG1 HIS 178.A ND1 no hydrogen 2.880 N/A LEU 231.A N TYR 177.A O no hydrogen 2.732 N/A PHE 232.A N ILE 45.A O no hydrogen 2.760 N/A ILE 233.A N ALA 175.A O no hydrogen 2.833 N/A SER 235.A OG GLY 172.A O no hydrogen 2.730 N/A TRP 237.A N PRO 234.A O no hydrogen 3.464 N/A TRP 237.A NE1 THR 42.A O no hydrogen 3.115 N/A ILE 238.A N ILE 189.A O no hydrogen 3.098 N/A TYR 239.A N HIS 167.A O no hydrogen 3.035 N/A TYR 239.A OH ASP 169.A OD1 no hydrogen 2.997 N/A TYR 239.A OH ASP 169.A OD2 no hydrogen 2.655 N/A ALA 240.A N TYR 187.A O no hydrogen 3.098 N/A THR 241.A N THR 164.A O no hydrogen 2.909 N/A LEU 242.A N THR 185.A O no hydrogen 2.869 N/A THR 243.A N SER 162.A O no hydrogen 2.856 N/A THR 243.A OG1 SER 162.A OG no hydrogen 3.165 N/A CYS 247.A N CYS 158.A O no hydrogen 2.884 N/A CYS 247.A SG LYS 181.A O no hydrogen 3.469 N/A LEU 248.A N LYS 181.A O no hydrogen 2.961 N/A ALA 249.A N LEU 156.A O no hydrogen 2.880 N/A PHE 250.A N HIS 178.A O no hydrogen 2.826 N/A ALA 251.A N TYR 154.A O no hydrogen 2.996 N/A GLY 252.A N TRP 176.A O no hydrogen 3.160 N/A HIS 253.A N VAL 151.A O no hydrogen 3.059 N/A PHE 254.A N SER 174.A O no hydrogen 2.950 N/A HIS 256.A N GLN 263.A OE1 no hydrogen 2.898 N/A HIS 256.A NE2 SER 174.A OG no hydrogen 2.933 N/A LEU 258.A N HIS 256.A ND1 no hydrogen 3.103 N/A SER 259.A N HIS 256.A O no hydrogen 3.521 N/A GLN 263.A N SER 259.A O no hydrogen 2.894 N/A GLN 263.A NE2 HIS 256.A O no hydrogen 3.526 N/A MET 264.A N VAL 260.A O no hydrogen 3.088 N/A ARG 265.A N GLU 261.A O no hydrogen 2.903 N/A ARG 265.A NH2 SER 197.A OG no hydrogen 3.347 N/A ALA 266.A N MET 262.A O no hydrogen 2.777 N/A TYR 267.A N GLN 263.A O no hydrogen 2.904 N/A TYR 267.A OH GLU 285.A OE2 no hydrogen 2.570 N/A GLU 268.A N MET 264.A O no hydrogen 2.833 N/A VAL 269.A N ARG 265.A O no hydrogen 2.994 N/A GLU 270.A N ALA 266.A O no hydrogen 3.059 N/A ARG 271.A N TYR 267.A O no hydrogen 2.956 N/A ARG 272.A N GLU 268.A O no hydrogen 3.088 N/A ARG 272.A NE GLU 200.A OE2 no hydrogen 2.766 N/A ARG 272.A NH2 GLU 200.A OE1 no hydrogen 2.962 N/A LEU 273.A N VAL 269.A O no hydrogen 2.886 N/A LYS 274.A N GLU 270.A O no hydrogen 3.034 N/A PHE 281.A N SER 170.A OG no hydrogen 2.605 N/A GLU 285.A N GLU 339.A OE1 no hydrogen 3.082 N/A THR 286.A OG1 ASN 283.A OD1 no hydrogen 2.873 N/A THR 286.A OG1 GLU 339.A O no hydrogen 2.653 N/A ALA 287.A N ASN 283.A O no hydrogen 3.073 N/A CYS 288.A N PHE 284.A O no hydrogen 3.052 N/A CYS 288.A SG PHE 284.A O no hydrogen 3.477 N/A TRP 289.A N GLU 285.A O no hydrogen 2.840 N/A TYR 290.A N THR 286.A O no hydrogen 3.076 N/A MET 291.A N ALA 287.A O no hydrogen 2.985 N/A GLY 292.A N CYS 288.A O no hydrogen 2.815 N/A LYS 293.A N TRP 289.A O no hydrogen 3.012 N/A HIS 294.A N TYR 290.A O no hydrogen 3.040 N/A LEU 295.A N MET 291.A O no hydrogen 2.895 N/A LEU 296.A N GLY 292.A O no hydrogen 2.989 N/A GLU 297.A N LYS 293.A O no hydrogen 3.161 N/A ALA 298.A N HIS 294.A O no hydrogen 2.893 N/A PHE 299.A N LEU 295.A O no hydrogen 2.877 N/A LYS 300.A N LEU 296.A O no hydrogen 3.115 N/A GLY 301.A N GLU 297.A O no hydrogen 3.043 N/A SER 302.A N ALA 298.A O no hydrogen 3.102 N/A SER 302.A OG PHE 299.A O no hydrogen 2.526 N/A HIS 303.A N PHE 299.A O no hydrogen 3.263 N/A HIS 303.A NE2 GLU 356.A OE1 no hydrogen 3.141 N/A HIS 303.A NE2 GLU 356.A OE2 no hydrogen 2.432 N/A LYS 304.A N GLY 301.A O no hydrogen 3.034 N/A SER 305.A N GLY 301.A O no hydrogen 2.868 N/A SER 305.A N SER 302.A O no hydrogen 3.291 N/A SER 305.A OG GLY 301.A O no hydrogen 3.007 N/A GLY 306.A N SER 302.A O no hydrogen 2.629 N/A LYS 307.A N SER 305.A OG no hydrogen 3.274 N/A GLN 308.A NE2 SER 360.A O no hydrogen 3.012 N/A LEU 313.A N PRO 310.A O no hydrogen 2.975 N/A VAL 314.A N PRO 310.A O no hydrogen 3.215 N/A GLN 315.A N PRO 311.A O no hydrogen 2.784 N/A GLY 316.A N HIS 312.A O no hydrogen 2.783 N/A ALA 317.A N LEU 313.A O no hydrogen 2.822 N/A LYS 318.A N VAL 314.A O no hydrogen 3.141 N/A LYS 318.A NZ GLU 361.A OE2 no hydrogen 2.891 N/A ILE 319.A N GLN 315.A O no hydrogen 3.107 N/A LEU 320.A N GLY 316.A O no hydrogen 2.880 N/A ASN 321.A N ALA 317.A O no hydrogen 2.722 N/A ASN 321.A ND2 ILE 350.A O no hydrogen 3.102 N/A GLY 322.A N LYS 318.A O no hydrogen 3.043 N/A ALA 323.A N ILE 319.A O no hydrogen 3.099 N/A PHE 324.A N LEU 320.A O no hydrogen 2.751 N/A ARG 325.A N ASN 321.A O no hydrogen 2.924 N/A SER 326.A N GLY 322.A O no hydrogen 3.108 N/A SER 326.A OG ALA 323.A O no hydrogen 2.824 N/A TRP 327.A N ALA 323.A O no hydrogen 2.934 N/A THR 328.A N ARG 325.A O no hydrogen 3.081 N/A THR 328.A OG1 PHE 324.A O no hydrogen 2.933 N/A THR 328.A OG1 ARG 325.A O no hydrogen 3.507 N/A ALA 332.A N LYS 329.A O no hydrogen 2.732 N/A HIS 336.A ND1 GLU 285.A OE1 no hydrogen 2.594 N/A GLU 337.A N LEU 333.A O no hydrogen 2.804 N/A GLU 337.A N ALA 334.A O no hydrogen 3.053 N/A GLU 339.A N HIS 336.A O no hydrogen 3.126 N/A LEU 340.A N GLU 337.A O no hydrogen 3.090 N/A GLU 342.A N GLU 342.A OE1 no hydrogen 2.720 N/A PHE 344.A N PRO 341.A O no hydrogen 3.280 N/A LEU 349.A N LYS 345.A O no hydrogen 2.926 N/A ILE 350.A N PRO 346.A O no hydrogen 2.891 N/A LYS 351.A N SER 347.A O no hydrogen 3.147 N/A ASP 352.A N GLN 348.A O no hydrogen 2.920 N/A LEU 353.A N LEU 349.A O no hydrogen 2.819 N/A ALA 354.A N ILE 350.A O no hydrogen 3.109 N/A LYS 355.A N LYS 351.A O no hydrogen 3.227 N/A GLU 356.A N ASP 352.A O no hydrogen 3.048 N/A ILE 357.A N LEU 353.A O no hydrogen 2.715 N/A ARG 358.A N ALA 354.A O no hydrogen 2.922 N/A LEU 359.A N LYS 355.A O no hydrogen 3.007 N/A SER 360.A N GLU 356.A O no hydrogen 3.107 N/A SER 360.A OG GLN 308.A OE1 no hydrogen 2.795 N/A GLU 361.A N ILE 357.A O no hydrogen 3.037 N/A ASN 362.A N LEU 359.A O no hydrogen 3.057 N/A ALA 363.A N ARG 358.A O no hydrogen 2.973 N/A