Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 7p6j_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): SER 1.A OG ASP 3.A OD1 no hydrogen 3.147 N/A LEU 4.A N ASP 310.A OD2 no hydrogen 2.997 N/A GLY 6.A N ILE 273.A O no hydrogen 2.986 N/A ILE 7.A N THR 45.A O no hydrogen 3.109 N/A ASN 8.A N TYR 275.A O no hydrogen 2.768 N/A ASN 8.A ND2 GLY 244.A O no hydrogen 3.056 N/A ASN 8.A ND2 TYR 275.A O no hydrogen 3.127 N/A VAL 9.A N ARG 47.A O no hydrogen 2.879 N/A ALA 10.A N ALA 278.A O no hydrogen 2.937 N/A GLY 11.A N GLU 13.A OE1 no hydrogen 2.819 N/A GLU 13.A N GLU 13.A OE1 no hydrogen 2.653 N/A PHE 14.A N GLY 11.A O no hydrogen 3.259 N/A THR 15.A OG1 HIS 26.A O no hydrogen 2.717 N/A LYS 18.A N THR 15.A O no hydrogen 2.979 N/A LYS 22.A N HIS 26.A ND1 no hydrogen 2.987 N/A LYS 22.A NZ HIS 23.A O no hydrogen 3.068 N/A LYS 22.A NZ THR 25.A OG1 no hydrogen 2.814 N/A GLY 24.A N TYR 27.A O no hydrogen 2.901 N/A THR 25.A N LYS 22.A O no hydrogen 3.098 N/A HIS 26.A N LYS 22.A O no hydrogen 2.911 N/A PHE 28.A N GLY 11.A O no hydrogen 2.924 N/A PHE 29.A N HIS 23.A NE2 no hydrogen 3.029 N/A TYR 34.A N PRO 31.A O no hydrogen 3.033 N/A TYR 34.A OH GLU 290.A OE1 no hydrogen 2.642 N/A PHE 35.A N GLN 77.A OE1 no hydrogen 2.813 N/A GLU 36.A N GLY 33.A O no hydrogen 3.436 N/A SER 39.A N PHE 35.A O no hydrogen 2.891 N/A SER 39.A OG ASN 81.A O no hydrogen 2.919 N/A GLU 40.A N GLU 36.A O no hydrogen 3.007 N/A GLN 41.A N TYR 37.A O no hydrogen 3.117 N/A GLN 41.A N TRP 38.A O no hydrogen 3.151 N/A GLY 42.A N SER 39.A O no hydrogen 3.012 N/A ILE 43.A N TRP 38.A O no hydrogen 3.025 N/A THR 45.A OG1 ASP 3.A OD2 no hydrogen 2.659 N/A VAL 46.A N LYS 84.A O no hydrogen 2.849 N/A ARG 47.A N ILE 7.A O no hydrogen 2.763 N/A ARG 47.A NE ASP 131.A OD2 no hydrogen 2.764 N/A ARG 47.A NH1 ASN 8.A OD1 no hydrogen 2.825 N/A ARG 47.A NH2 ASP 131.A OD2 no hydrogen 3.010 N/A ARG 47.A NH2 ASN 134.A OD1 no hydrogen 2.896 N/A ARG 47.A NH2 GLU 167.A OE2 no hydrogen 3.115 N/A PHE 48.A N ILE 86.A O no hydrogen 2.751 N/A LEU 50.A N ASP 88.A O no hydrogen 2.691 N/A LYS 51.A N TYR 67.A OH no hydrogen 3.130 N/A LYS 51.A NZ.A GLY 16.A O no hydrogen 3.097 N/A LYS 51.A NZ.A GLU 53.A OE1 no hydrogen 3.337 N/A LYS 51.A NZ.B HIS 90.A O no hydrogen 2.839 N/A TRP 52.A N ASN 91.A OD1 no hydrogen 2.729 N/A TRP 52.A NE1 GLN 56.A OE1 no hydrogen 2.986 N/A GLU 53.A N GLU 53.A OE1 no hydrogen 2.655 N/A ARG 54.A N LYS 51.A O no hydrogen 3.153 N/A ARG 54.A NE PRO 20.A O no hydrogen 2.892 N/A ARG 54.A NH1 ALA 12.A O no hydrogen 3.214 N/A ARG 54.A NH1 PHE 14.A O no hydrogen 2.820 N/A ARG 54.A NH2 PHE 14.A O no hydrogen 2.886 N/A ARG 54.A NH2 THR 15.A O no hydrogen 2.905 N/A ARG 54.A NH2 LYS 18.A O no hydrogen 2.931 N/A LEU 55.A N LYS 51.A O no hydrogen 2.999 N/A GLN 56.A N TRP 52.A O no hydrogen 2.779 N/A GLN 56.A NE2 ALA 61.A O no hydrogen 2.853 N/A GLN 56.A NE2 ASP 112.A OD2 no hydrogen 2.983 N/A ALA 61.A N SER 58.A O no hydrogen 3.260 N/A ASP 64.A N LEU 55.A O no hydrogen 2.841 N/A TYR 67.A N ASP 64.A OD2 no hydrogen 2.913 N/A TYR 67.A OH ALA 12.A O no hydrogen 2.715 N/A ALA 68.A N ASP 64.A O no hydrogen 2.869 N/A SER 69.A N ASP 65.A O no hydrogen 2.831 N/A SER 69.A OG ASP 65.A O no hydrogen 2.609 N/A SER 69.A OG ASP 65.A OD1.A no hydrogen 3.390 N/A LEU 70.A N VAL 66.A O no hydrogen 3.165 N/A VAL 71.A N TYR 67.A O no hydrogen 3.158 N/A ASP 72.A N ALA 68.A O no hydrogen 2.857 N/A ASP 73.A N SER 69.A O no hydrogen 2.949 N/A MET 74.A N LEU 70.A O no hydrogen 3.017 N/A LEU 75.A N VAL 71.A O no hydrogen 2.934 N/A ASP 76.A N ASP 72.A O no hydrogen 2.950 N/A GLN 77.A N ASP 73.A O no hydrogen 2.929 N/A GLN 77.A NE2 PRO 31.A O no hydrogen 3.060 N/A ALA 78.A N MET 74.A O no hydrogen 2.903 N/A LYS 79.A N LEU 75.A O no hydrogen 2.942 N/A GLU 80.A N ASP 76.A O no hydrogen 2.939 N/A ASN 81.A N GLN 77.A O no hydrogen 3.150 N/A ASN 81.A N ALA 78.A O no hydrogen 3.080 N/A ASN 81.A ND2 GLN 77.A O no hydrogen 2.872 N/A ASP 82.A N LYS 79.A O no hydrogen 3.329 N/A ILE 83.A N ALA 78.A O no hydrogen 2.908 N/A LYS 84.A N HIS 44.A O no hydrogen 2.830 N/A LYS 84.A NZ ASP 125.A O no hydrogen 2.791 N/A VAL 85.A N ALA 126.A O no hydrogen 2.833 N/A ILE 86.A N VAL 46.A O no hydrogen 2.702 N/A LEU 87.A N ALA 129.A O no hydrogen 3.174 N/A ASP 88.A N PHE 48.A O no hydrogen 3.110 N/A VAL 89.A N ASP 131.A O no hydrogen 3.189 N/A HIS 90.A N LEU 50.A O no hydrogen 2.808 N/A HIS 90.A ND1 ASP 88.A OD2 no hydrogen 2.659 N/A ASN 91.A N VAL 89.A O no hydrogen 3.049 N/A ASN 91.A ND2 GLU 53.A OE1 no hydrogen 2.880 N/A ASN 91.A ND2 ARG 94.A O no hydrogen 2.917 N/A TYR 92.A N ASN 134.A O no hydrogen 2.823 N/A ARG 94.A N ASN 91.A O no hydrogen 2.965 N/A ARG 94.A NH1 TYR 92.A O no hydrogen 2.952 N/A ARG 94.A NH1 TYR 137.A O no hydrogen 2.990 N/A ARG 94.A NH2 TYR 137.A O no hydrogen 3.105 N/A TYR 95.A N LYS 98.A O no hydrogen 2.813 N/A TYR 95.A OH GLN 56.A O no hydrogen 2.770 N/A ARG 96.A N GLU 53.A OE2 no hydrogen 2.770 N/A ARG 96.A NE TYR 95.A OH no hydrogen 3.472 N/A ARG 96.A NH2 PRO 57.A O no hydrogen 2.902 N/A LYS 98.A N TYR 95.A O no hydrogen 3.030 N/A ILE 100.A N ALA 93.A O no hydrogen 2.987 N/A GLY 101.A N VAL 105.A O no hydrogen 2.746 N/A THR 102.A N VAL 99.A O no hydrogen 3.071 N/A THR 102.A OG1 VAL 99.A O no hydrogen 2.573 N/A VAL 105.A N THR 102.A O no hydrogen 3.298 N/A ALA 109.A N PRO 106.A O no hydrogen 2.888 N/A TYR 110.A N PRO 106.A O no hydrogen 3.411 N/A TYR 110.A OH ILE 132.A O no hydrogen 2.599 N/A GLN 111.A N VAL 107.A O no hydrogen 2.822 N/A GLN 111.A NE2 GLU 115.A OE2 no hydrogen 3.087 N/A ASP 112.A N SER 108.A O no hydrogen 2.991 N/A LEU 113.A N ALA 109.A O no hydrogen 3.152 N/A MET 114.A N TYR 110.A O no hydrogen 3.152 N/A GLU 115.A N GLN 111.A O no hydrogen 2.862 N/A ARG 116.A N ASP 112.A O no hydrogen 3.000 N/A ARG 116.A NE ASP 112.A OD2 no hydrogen 2.869 N/A ARG 116.A NH2 ASN 60.A O no hydrogen 3.176 N/A ILE 117.A N LEU 113.A O no hydrogen 2.889 N/A ALA 118.A N MET 114.A O no hydrogen 2.934 N/A LYS 119.A N GLU 115.A O no hydrogen 2.866 N/A ARG 120.A N ARG 116.A O no hydrogen 3.057 N/A ARG 120.A NE ASP 72.A OD1 no hydrogen 3.287 N/A ARG 120.A NH1 ASP 65.A OD1.A no hydrogen 3.115 N/A ARG 120.A NH2 ASP 65.A OD1.A no hydrogen 3.125 N/A ARG 120.A NH2 ASP 72.A OD2 no hydrogen 2.629 N/A TRP 121.A N ILE 117.A O no hydrogen 3.107 N/A TRP 121.A NE1 ASP 72.A OD1 no hydrogen 2.669 N/A GLN 122.A N ALA 118.A O no hydrogen 2.842 N/A HIS 124.A N TRP 121.A O no hydrogen 2.946 N/A HIS 124.A NE2 ASP 76.A OD1 no hydrogen 2.851 N/A ALA 126.A N HIS 124.A ND1 no hydrogen 3.063 N/A LEU 127.A N HIS 124.A O no hydrogen 2.979 N/A PHE 128.A N VAL 85.A O no hydrogen 2.722 N/A TYR 130.A N PRO 163.A O no hydrogen 3.288 N/A TYR 130.A OH ASP 159.A OD2 no hydrogen 2.732 N/A ASP 131.A N LEU 87.A O no hydrogen 2.775 N/A ILE 132.A N LEU 165.A O no hydrogen 3.265 N/A ASN 134.A N VAL 89.A O no hydrogen 2.892 N/A GLU 135.A N GLU 167.A OE1 no hydrogen 2.887 N/A ALA 140.A N TYR 137.A O no hydrogen 3.139 N/A ASP 141.A N GLY 138.A O no hydrogen 2.950 N/A TRP 144.A N ASP 141.A O no hydrogen 3.259 N/A TRP 144.A NE1 GLU 167.A O no hydrogen 2.772 N/A ALA 147.A N LEU 143.A O no hydrogen 3.209 N/A ALA 148.A N TRP 144.A O no hydrogen 2.732 N/A GLN 149.A N PRO 145.A O no hydrogen 3.146 N/A GLN 149.A NE2 GLN 149.A O no hydrogen 3.266 N/A GLN 149.A NE2 ASP 153.A OD1 no hydrogen 3.027 N/A GLN 149.A NE2 LYS 188.A O no hydrogen 2.927 N/A ALA 150.A N ALA 146.A O no hydrogen 3.224 N/A GLY 151.A N ALA 147.A O no hydrogen 2.890 N/A ILE 152.A N ALA 148.A O no hydrogen 2.836 N/A ASP 153.A N GLN 149.A O no hydrogen 2.878 N/A GLY 154.A N ALA 150.A O no hydrogen 2.933 N/A VAL 155.A N GLY 151.A O no hydrogen 3.182 N/A ARG 156.A N ILE 152.A O no hydrogen 3.033 N/A ARG 156.A NE ASP 189.A OD1 no hydrogen 2.652 N/A ARG 156.A NH1 ASP 159.A O no hydrogen 2.871 N/A ARG 156.A NH1 ARG 162.A O no hydrogen 2.985 N/A ARG 156.A NH2 ARG 162.A O no hydrogen 2.968 N/A ARG 156.A NH2 ASP 189.A OD2 no hydrogen 2.938 N/A LYS 157.A N ASP 153.A O no hydrogen 3.308 N/A LYS 157.A N GLY 154.A O no hydrogen 3.298 N/A TYR 158.A N VAL 155.A O no hydrogen 2.920 N/A ASP 159.A N VAL 155.A O no hydrogen 2.814 N/A LYS 160.A NZ ARG 156.A O no hydrogen 2.833 N/A LYS 161.A N ASP 159.A OD1 no hydrogen 3.009 N/A ARG 162.A N ASP 159.A OD1 no hydrogen 2.987 N/A ARG 162.A NE LEU 127.A O no hydrogen 2.824 N/A ARG 162.A NH1 GLN 122.A O no hydrogen 2.737 N/A ARG 162.A NH1 ASP 159.A OD2 no hydrogen 2.779 N/A ARG 162.A NH2 GLN 122.A O no hydrogen 3.060 N/A ARG 162.A NH2 LEU 127.A O no hydrogen 3.501 N/A LEU 164.A N ASN 193.A O no hydrogen 3.027 N/A LEU 165.A N TYR 130.A O no hydrogen 2.709 N/A ILE 166.A N VAL 195.A O no hydrogen 2.813 N/A GLY 168.A N SER 172.A OG no hydrogen 2.857 N/A SER 170.A N ASP 141.A OD1 no hydrogen 2.999 N/A TRP 171.A N PRO 136.A O no hydrogen 2.865 N/A SER 172.A OG SER 197.A O no hydrogen 2.621 N/A SER 173.A N SER 170.A O no hydrogen 3.010 N/A ALA 174.A N HIS 199.A O no hydrogen 3.093 N/A ARG 176.A N SER 173.A OG no hydrogen 3.083 N/A ARG 176.A NE SER 170.A OG no hydrogen 3.042 N/A ARG 176.A NH2 SER 170.A O no hydrogen 3.225 N/A ARG 176.A NH2 SER 170.A OG no hydrogen 2.892 N/A TRP 177.A N ALA 174.A O no hydrogen 3.290 N/A ARG 179.A N ARG 176.A O no hydrogen 2.889 N/A TYR 180.A N TRP 177.A O no hydrogen 3.215 N/A ALA 181.A N TRP 177.A O no hydrogen 3.004 N/A GLU 183.A N TYR 180.A O no hydrogen 3.244 N/A LEU 184.A N ALA 181.A O no hydrogen 2.784 N/A LEU 185.A N ASP 182.A O no hydrogen 3.056 N/A LEU 187.A N LEU 184.A O no hydrogen 3.186 N/A LYS 188.A N GLN 149.A OE1 no hydrogen 2.824 N/A ALA 191.A N ASP 189.A OD1 no hydrogen 3.058 N/A ASP 192.A N ASP 189.A O no hydrogen 2.893 N/A ASN 193.A N ASP 189.A OD2 no hydrogen 2.809 N/A ASN 193.A ND2 LYS 161.A O no hydrogen 2.833 N/A VAL 195.A N LEU 164.A O no hydrogen 2.830 N/A PHE 196.A N LYS 240.A O no hydrogen 2.867 N/A SER 197.A N ILE 166.A O no hydrogen 2.923 N/A SER 197.A OG HIS 242.A ND1 no hydrogen 2.873 N/A ALA 198.A N HIS 242.A O no hydrogen 2.930 N/A HIS 199.A N SER 172.A O no hydrogen 2.835 N/A HIS 199.A ND1 GLU 135.A OE2 no hydrogen 2.698 N/A VAL 200.A N GLU 245.A O no hydrogen 2.993 N/A ILE 202.A N TYR 210.A OH no hydrogen 3.044 N/A SER 207.A N ASP 205.A OD1 no hydrogen 3.076 N/A SER 207.A OG ASP 203.A OD2 no hydrogen 3.497 N/A SER 207.A OG ASP 205.A OD1 no hydrogen 2.748 N/A SER 207.A OG ASP 205.A OD2 no hydrogen 3.177 N/A SER 207.A OG SER 209.A OG no hydrogen 3.047 N/A GLY 208.A N ASP 203.A OD1 no hydrogen 3.160 N/A SER 209.A N SER 207.A OG no hydrogen 3.367 N/A SER 209.A OG SER 207.A OG no hydrogen 3.047 N/A TYR 210.A N ASP 203.A OD2 no hydrogen 3.229 N/A TYR 210.A OH GLY 247.A O no hydrogen 2.652 N/A MET 221.A N GLU 219.A OE2.A no hydrogen 3.238 N/A ILE 222.A N GLU 219.A O no hydrogen 2.995 N/A LYS 225.A N MET 221.A O no hydrogen 2.836 N/A LYS 225.A NZ.A GLU 219.A OE1.A no hydrogen 3.321 N/A ARG 226.A N ILE 222.A O no hydrogen 2.986 N/A ARG 226.A NH1 PHE 201.A O no hydrogen 2.877 N/A ARG 226.A NH1 ASP 203.A O no hydrogen 2.704 N/A ARG 226.A NH2 ASP 203.A O no hydrogen 3.147 N/A ARG 226.A NH2 GLU 204.A O.A no hydrogen 3.317 N/A ARG 226.A NH2 GLU 204.A O.B no hydrogen 3.248 N/A VAL 227.A N GLY 223.A O no hydrogen 3.238 N/A VAL 227.A N VAL 224.A O no hydrogen 3.291 N/A GLU 228.A N VAL 224.A O no hydrogen 2.951 N/A VAL 231.A N VAL 227.A O no hydrogen 2.880 N/A ASN 232.A N GLU 228.A O no hydrogen 2.789 N/A TRP 233.A N PRO 229.A O no hydrogen 3.090 N/A TRP 233.A NE1 ASP 182.A OD1 no hydrogen 2.995 N/A LEU 234.A N PHE 230.A O no hydrogen 2.984 N/A LYS 235.A N VAL 231.A O no hydrogen 2.962 N/A LYS 235.A NZ ASN 269.A OD1 no hydrogen 3.055 N/A GLU 236.A N ASN 232.A O no hydrogen 2.939 N/A HIS 237.A N TRP 233.A O no hydrogen 3.077 N/A GLY 238.A N LYS 235.A O no hydrogen 3.418 N/A LYS 239.A N LEU 234.A O no hydrogen 2.909 N/A LYS 240.A NZ.A PHE 315.A O no hydrogen 2.989 N/A LYS 240.A NZ.A PRO 317.A O no hydrogen 2.622 N/A LYS 240.A NZ.C ASP 314.A OD1.A no hydrogen 2.712 N/A LYS 240.A NZ.C ASP 314.A OD2.A no hydrogen 2.261 N/A GLY 241.A N GLY 316.A O no hydrogen 2.858 N/A HIS 242.A ND1 SER 197.A OG no hydrogen 2.873 N/A ILE 243.A N PRO 272.A O no hydrogen 2.859 N/A GLY 244.A N ALA 198.A O no hydrogen 2.997 N/A ILE 248.A N TYR 275.A OH no hydrogen 3.065 N/A ASN 250.A ND2 GLU 295.A OE1 no hydrogen 3.267 N/A ASN 250.A ND2 LYS 296.A O no hydrogen 2.461 N/A GLU 253.A N GLU 253.A OE1.B no hydrogen 2.701 N/A ARG 254.A N ASP 252.A OD1 no hydrogen 2.862 N/A ARG 254.A NE ASP 252.A OD1 no hydrogen 3.184 N/A ARG 254.A NH2 ASP 252.A OD2 no hydrogen 3.051 N/A TRP 255.A N ASP 252.A O no hydrogen 3.065 N/A ASP 257.A N GLU 253.A O no hydrogen 3.016 N/A ALA 258.A N ARG 254.A O no hydrogen 3.161 N/A MET 259.A N TRP 255.A O no hydrogen 3.022 N/A ASP 260.A N LEU 256.A O no hydrogen 2.837 N/A LYS 261.A N ASP 257.A O no hydrogen 3.006 N/A LEU 262.A N ALA 258.A O no hydrogen 2.958 N/A LEU 263.A N MET 259.A O no hydrogen 2.926 N/A ALA 264.A N ASP 260.A O no hydrogen 2.940 N/A TYR 265.A N LYS 261.A O no hydrogen 3.175 N/A LEU 266.A N LEU 262.A O no hydrogen 2.837 N/A ASN 267.A N LEU 263.A O no hydrogen 2.778 N/A ASN 267.A ND2 LYS 309.A O no hydrogen 3.199 N/A GLU 268.A N ALA 264.A O no hydrogen 2.996 N/A ASN 269.A N TYR 265.A O no hydrogen 3.312 N/A ASN 269.A N LEU 266.A O no hydrogen 3.155 N/A ASN 269.A ND2 TYR 265.A O no hydrogen 2.927 N/A CYS 270.A N ASN 267.A O no hydrogen 3.068 N/A ILE 271.A N LEU 266.A O no hydrogen 2.925 N/A ILE 273.A N LEU 4.A O no hydrogen 2.833 N/A ASN 274.A N ILE 243.A O no hydrogen 2.837 N/A ASN 274.A ND2 ILE 273.A O no hydrogen 3.056 N/A TYR 275.A N GLY 6.A O no hydrogen 2.954 N/A TYR 275.A OH LEU 287.A O no hydrogen 3.389 N/A TRP 276.A N PHE 246.A O no hydrogen 2.631 N/A TRP 276.A NE1 TYR 285.A OH no hydrogen 2.972 N/A ALA 278.A N ASN 8.A O no hydrogen 2.704 N/A GLY 279.A N GLU 290.A OE1 no hydrogen 2.962 N/A TRP 282.A NE1 ALA 278.A O no hydrogen 2.886 N/A TYR 285.A N TRP 282.A O no hydrogen 3.155 N/A LYS 286.A NZ SER 209.A O no hydrogen 2.813 N/A LYS 286.A NZ TYR 210.A O no hydrogen 2.826 N/A SER 288.A N TYR 285.A O no hydrogen 3.104 N/A ILE 289.A N ALA 277.A O no hydrogen 3.042 N/A GLU 290.A N SER 288.A OG no hydrogen 3.086 N/A GLU 295.A N LYS 292.A O no hydrogen 2.737 N/A ARG 297.A NE GLU 290.A O no hydrogen 2.902 N/A ARG 297.A NH2 GLU 290.A O no hydrogen 3.177 N/A GLN 299.A N GLN 299.A OE1 no hydrogen 2.583 N/A GLN 299.A NE2 ILE 248.A O no hydrogen 3.009 N/A VAL 300.A N ARG 297.A O no hydrogen 3.171 N/A LEU 303.A N GLN 299.A O no hydrogen 2.963 N/A LYS 304.A N VAL 300.A O no hydrogen 2.803 N/A LYS 304.A NZ GLN 41.A OE1 no hydrogen 2.960 N/A LYS 305.A N ALA 301.A O no hydrogen 2.948 N/A LYS 305.A NZ ASP 260.A OD2 no hydrogen 2.718 N/A TYR 306.A N LEU 302.A O no hydrogen 3.213 N/A TYR 306.A OH ASP 260.A OD1 no hydrogen 2.355 N/A ALA 307.A N LEU 303.A O no hydrogen 2.836 N/A ALA 308.A N LYS 304.A O no hydrogen 3.218 N/A LYS 309.A N TYR 306.A O no hydrogen 3.092 N/A ASP 310.A N ALA 307.A O no hydrogen 3.334 N/A ASN 311.A ND2 LYS 309.A O no hydrogen 3.466 N/A CYS 312.A N ASP 310.A OD1 no hydrogen 2.961 N/A CYS 312.A SG ASN 267.A O no hydrogen 3.977 N/A SER 313.A OG.A ASP 314.A OD2.B no hydrogen 3.521 N/A GLY 316.A N CYS 270.A O no hydrogen 2.718 N/A