Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 4qru_A.cif H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): HIS 3.A N VAL 103.A O no hydrogen 2.974 N/A HIS 3.A ND1 ASP 29.A OD2 no hydrogen 2.676 N/A SER 4.A N.A ASP 29.A OD1 no hydrogen 2.876 N/A SER 4.A N.B ASP 29.A OD1 no hydrogen 2.854 N/A SER 4.A OG.B ASP 102.A OD1 no hydrogen 2.677 N/A MET 5.A N CYS 101.A O no hydrogen 2.926 N/A ARG 6.A N.A TYR 27.A O no hydrogen 2.930 N/A ARG 6.A N.B TYR 27.A O no hydrogen 2.979 N/A ARG 6.A NH1.A MET 5.A O no hydrogen 3.225 N/A ARG 6.A NH1.A CYS 101.A O no hydrogen 3.445 N/A ARG 6.A NH1.A ASP 102.A OD1 no hydrogen 2.658 N/A ARG 6.A NH1.B ASP 102.A OD1 no hydrogen 2.927 N/A ARG 6.A NH2.A ASP 102.A OD1 no hydrogen 2.836 N/A ARG 6.A NH2.A ASP 102.A OD2 no hydrogen 3.399 N/A ARG 6.A NH2.B MET 5.A O no hydrogen 2.948 N/A ARG 6.A NH2.B CYS 101.A O no hydrogen 3.537 N/A ARG 6.A NH2.B ASP 102.A OD1 no hydrogen 3.085 N/A TYR 7.A N TYR 99.A O no hydrogen 2.848 N/A PHE 8.A N VAL 25.A O no hydrogen 2.851 N/A ASP 9.A N SER 97.A O no hydrogen 2.807 N/A THR 10.A N ILE 23.A O no hydrogen 2.855 N/A ALA 11.A N LEU 95.A O no hydrogen 2.754 N/A MET 12.A N ARG 21.A O no hydrogen 2.873 N/A SER 13.A N HIS 93.A O no hydrogen 2.901 N/A SER 13.A OG HIS 93.A O no hydrogen 3.521 N/A ARG 14.A NE GLU 19.A O no hydrogen 2.769 N/A ARG 14.A NH1 ASP 39.A OD2 no hydrogen 2.896 N/A ARG 14.A NH2 GLU 19.A O no hydrogen 3.100 N/A ARG 14.A NH2 ASP 39.A OD1 no hydrogen 2.865 N/A ARG 14.A NH2 ASP 39.A OD2 no hydrogen 3.471 N/A ARG 17.A N ARG 14.A O no hydrogen 2.861 N/A ARG 21.A N MET 12.A O no hydrogen 2.944 N/A ARG 21.A NE ASP 37.A OD1 no hydrogen 3.241 N/A ARG 21.A NH2 ASP 37.A OD2 no hydrogen 2.988 N/A PHE 22.A N.A SER 38.A OG no hydrogen 2.885 N/A PHE 22.A N.B SER 38.A OG no hydrogen 2.865 N/A ILE 23.A N THR 10.A O no hydrogen 2.937 N/A SER 24.A N PHE 36.A O no hydrogen 2.837 N/A SER 24.A OG ASP 9.A OD1 no hydrogen 2.626 N/A VAL 25.A N PHE 8.A O no hydrogen 2.998 N/A GLY 26.A N VAL 34.A O no hydrogen 2.976 N/A TYR 27.A N ARG 6.A O.A no hydrogen 2.778 N/A TYR 27.A N ARG 6.A O.B no hydrogen 2.888 N/A VAL 28.A N THR 31.A O no hydrogen 2.915 N/A ASP 29.A N SER 4.A O.A no hydrogen 2.880 N/A ASP 29.A N SER 4.A O.B no hydrogen 2.933 N/A THR 31.A N VAL 28.A O no hydrogen 2.916 N/A THR 31.A OG1 TYR 209.A OH no hydrogen 2.761 N/A PHE 33.A N GLY 26.A O no hydrogen 2.769 N/A ARG 35.A NH1 GLU 46.A OE2 no hydrogen 2.869 N/A PHE 36.A N SER 24.A O no hydrogen 2.918 N/A SER 38.A N PHE 22.A O.A no hydrogen 2.835 N/A SER 38.A N PHE 22.A O.B no hydrogen 2.793 N/A SER 38.A OG PHE 22.A O.A no hydrogen 3.459 N/A SER 38.A OG PHE 22.A O.B no hydrogen 3.470 N/A ASP 39.A N ASP 37.A OD1 no hydrogen 2.927 N/A ALA 40.A N ASP 37.A O no hydrogen 2.946 N/A GLU 45.A N SER 42.A O no hydrogen 2.904 N/A GLU 46.A N PRO 43.A O no hydrogen 3.073 N/A ARG 48.A NE GLU 46.A O no hydrogen 3.453 N/A ALA 49.A N PHE 33.A O no hydrogen 2.846 N/A ILE 52.A N ALA 49.A O no hydrogen 2.761 N/A GLU 53.A N.A ALA 49.A O no hydrogen 2.952 N/A GLU 53.A N.B ALA 49.A O no hydrogen 2.941 N/A GLN 54.A N PRO 50.A O no hydrogen 3.262 N/A GLU 55.A N ILE 52.A O no hydrogen 2.934 N/A GLY 56.A N GLU 53.A O.A no hydrogen 3.440 N/A GLY 56.A N GLU 53.A O.B no hydrogen 3.467 N/A TYR 59.A OH TYR 171.A OH no hydrogen 2.564 N/A TRP 60.A N GLY 56.A O no hydrogen 3.357 N/A ASP 61.A N PRO 57.A O no hydrogen 2.786 N/A ARG 62.A N GLU 58.A O no hydrogen 3.047 N/A ASN 63.A N TYR 59.A O no hydrogen 2.917 N/A ASN 63.A ND2 TYR 59.A O no hydrogen 2.965 N/A THR 64.A N TRP 60.A O no hydrogen 2.772 N/A THR 64.A OG1 TRP 60.A O no hydrogen 2.939 N/A GLN 65.A N.A ASP 61.A O no hydrogen 3.069 N/A GLN 65.A N.B ASP 61.A O no hydrogen 3.056 N/A ILE 66.A N ARG 62.A O no hydrogen 3.051 N/A PHE 67.A N ASN 63.A O no hydrogen 2.923 N/A LYS 68.A N THR 64.A O no hydrogen 3.010 N/A LYS 68.A NZ GLN 65.A OE1.A no hydrogen 3.544 N/A THR 69.A N GLN 65.A O.A no hydrogen 3.041 N/A THR 69.A N GLN 65.A O.B no hydrogen 3.012 N/A THR 69.A OG1 GLN 65.A O.A no hydrogen 3.170 N/A THR 69.A OG1 GLN 65.A O.B no hydrogen 3.245 N/A ASN 70.A N ILE 66.A O no hydrogen 2.823 N/A THR 71.A N.A PHE 67.A O no hydrogen 2.880 N/A THR 71.A N.B PHE 67.A O no hydrogen 2.906 N/A THR 71.A OG1.A PHE 67.A O no hydrogen 3.006 N/A THR 71.A OG1.B LYS 68.A O no hydrogen 2.488 N/A GLN 72.A N LYS 68.A O no hydrogen 3.281 N/A THR 73.A N THR 69.A O no hydrogen 2.991 N/A THR 73.A OG1 THR 69.A O no hydrogen 3.252 N/A ASP 74.A N ASN 70.A O no hydrogen 2.844 N/A ARG 75.A N THR 71.A O.A no hydrogen 2.930 N/A ARG 75.A N THR 71.A O.B no hydrogen 2.934 N/A ARG 75.A NE.A PRO 20.A O no hydrogen 3.053 N/A ARG 75.A NH1.B GLU 19.A OE1 no hydrogen 3.484 N/A ARG 75.A NH2.A PRO 20.A O no hydrogen 2.631 N/A GLU 76.A N.A GLN 72.A O no hydrogen 3.089 N/A GLU 76.A N.B GLN 72.A O no hydrogen 3.110 N/A SER 77.A N THR 73.A O no hydrogen 2.954 N/A SER 77.A OG THR 73.A O no hydrogen 3.036 N/A LEU 78.A N ASP 74.A O no hydrogen 2.877 N/A ARG 79.A N ARG 75.A O no hydrogen 3.284 N/A ARG 79.A NH1 GLU 76.A OE1.A no hydrogen 2.316 N/A ARG 79.A NH1 GLU 76.A OE2.A no hydrogen 2.788 N/A ARG 79.A NH2 GLU 76.A OE2.A no hydrogen 2.887 N/A ASN 80.A N GLU 76.A O.A no hydrogen 2.921 N/A ASN 80.A N GLU 76.A O.B no hydrogen 2.925 N/A LEU 81.A N SER 77.A O no hydrogen 2.809 N/A ARG 82.A N LEU 78.A O no hydrogen 3.097 N/A ARG 82.A N ARG 79.A O no hydrogen 3.375 N/A ARG 82.A NE.C GLU 89.A OE2 no hydrogen 3.451 N/A ARG 82.A NH1.B SER 13.A OG no hydrogen 2.951 N/A ARG 82.A NH1.C SER 88.A O.A no hydrogen 2.585 N/A ARG 82.A NH1.C SER 88.A O.B no hydrogen 2.590 N/A ARG 82.A NH1.C GLY 91.A O no hydrogen 2.844 N/A ARG 82.A NH2.C SER 13.A OG no hydrogen 3.114 N/A ARG 82.A NH2.C GLY 91.A O no hydrogen 2.937 N/A GLY 83.A N ARG 79.A O no hydrogen 3.370 N/A TYR 84.A N ASN 80.A O no hydrogen 2.968 N/A TYR 85.A N LEU 81.A O no hydrogen 3.212 N/A TYR 85.A N ARG 82.A O no hydrogen 3.351 N/A TYR 85.A OH ASP 137.A OD1 no hydrogen 3.316 N/A TYR 85.A OH ASP 137.A OD2 no hydrogen 2.662 N/A ASN 86.A N GLY 83.A O no hydrogen 3.095 N/A GLN 87.A N ARG 82.A O no hydrogen 2.931 N/A ALA 90.A N SER 88.A OG.A no hydrogen 2.945 N/A ALA 90.A N SER 88.A OG.B no hydrogen 2.979 N/A SER 92.A OG.A SER 13.A O no hydrogen 2.478 N/A SER 92.A OG.B SER 13.A O no hydrogen 3.133 N/A HIS 93.A N SER 13.A OG no hydrogen 2.910 N/A HIS 93.A ND1 ASP 119.A OD2 no hydrogen 2.722 N/A THR 94.A N ASP 119.A OD1 no hydrogen 2.935 N/A LEU 95.A N ALA 11.A O no hydrogen 2.776 N/A GLN 96.A N ALA 117.A O no hydrogen 2.884 N/A SER 97.A N ASP 9.A O no hydrogen 2.938 N/A MET 98.A N GLN 115.A O no hydrogen 2.926 N/A TYR 99.A N TYR 7.A O no hydrogen 3.168 N/A GLY 100.A N HIS 113.A O no hydrogen 3.024 N/A CYS 101.A N MET 5.A O no hydrogen 3.035 N/A ASP 102.A N ARG 111.A O no hydrogen 2.878 N/A VAL 103.A N HIS 3.A O no hydrogen 2.800 N/A GLY 104.A N ARG 108.A O no hydrogen 2.971 N/A GLY 107.A N GLY 104.A O no hydrogen 2.876 N/A ARG 108.A N ASP 106.A OD1 no hydrogen 3.075 N/A LEU 110.A N ASP 102.A O no hydrogen 2.721 N/A ARG 111.A NE GLY 112.A O no hydrogen 2.943 N/A ARG 111.A NH2 GLY 112.A O no hydrogen 3.181 N/A HIS 113.A N GLY 100.A O no hydrogen 2.815 N/A HIS 113.A NE2 ASP 102.A OD2 no hydrogen 2.892 N/A GLN 115.A N MET 98.A O no hydrogen 2.927 N/A TYR 116.A N ILE 124.A O no hydrogen 2.832 N/A ALA 117.A N GLN 96.A O no hydrogen 2.862 N/A TYR 118.A N LYS 121.A O.A no hydrogen 2.909 N/A TYR 118.A N LYS 121.A O.B no hydrogen 2.850 N/A TYR 118.A OH GLN 87.A OE1 no hydrogen 2.698 N/A ASP 119.A N THR 94.A O no hydrogen 2.740 N/A LYS 121.A N.A TYR 118.A O no hydrogen 3.109 N/A LYS 121.A N.B TYR 118.A O no hydrogen 3.118 N/A TYR 123.A N TYR 116.A O no hydrogen 2.876 N/A TYR 123.A OH THR 143.A OG1 no hydrogen 2.706 N/A ALA 125.A N THR 134.A O no hydrogen 3.075 N/A LEU 126.A N ASN 114.A O no hydrogen 2.846 N/A ASN 127.A N SER 132.A O no hydrogen 2.796 N/A ASN 127.A ND2 SER 132.A OG no hydrogen 2.770 N/A LEU 130.A N.A ASN 127.A O no hydrogen 2.878 N/A LEU 130.A N.B ASN 127.A O no hydrogen 2.868 N/A ARG 131.A N ASP 129.A OD1 no hydrogen 2.854 N/A SER 132.A N ASP 129.A OD1 no hydrogen 2.961 N/A SER 132.A OG ASP 129.A OD1 no hydrogen 3.184 N/A SER 132.A OG ASP 129.A OD2 no hydrogen 2.762 N/A THR 134.A N ALA 125.A O no hydrogen 2.929 N/A THR 134.A OG1 ASN 127.A OD1 no hydrogen 2.520 N/A ALA 136.A N TYR 123.A O no hydrogen 2.937 N/A ALA 140.A N ASP 137.A OD1 no hydrogen 2.823 N/A GLN 141.A N ASP 137.A O no hydrogen 2.967 N/A ILE 142.A N ALA 139.A O no hydrogen 2.822 N/A THR 143.A N ALA 139.A O no hydrogen 3.434 N/A THR 143.A OG1 TYR 123.A OH no hydrogen 2.706 N/A GLN 144.A N ALA 140.A O no hydrogen 2.845 N/A GLN 144.A NE2 GLU 148.A OE2 no hydrogen 2.830 N/A ARG 145.A N GLN 141.A O no hydrogen 2.961 N/A LYS 146.A N ILE 142.A O no hydrogen 2.994 N/A LYS 146.A NZ TYR 84.A OH no hydrogen 2.723 N/A TRP 147.A N THR 143.A O no hydrogen 2.875 N/A GLU 148.A N GLN 144.A O no hydrogen 2.797 N/A ALA 149.A N ARG 145.A O no hydrogen 2.946 N/A ALA 150.A N LYS 146.A O no hydrogen 3.102 N/A ARG 151.A N GLU 148.A O no hydrogen 3.155 N/A ARG 151.A NH1 GLU 154.A OE2.A no hydrogen 2.725 N/A ARG 151.A NH1 GLU 154.A OE2.B no hydrogen 2.763 N/A VAL 152.A N TRP 147.A O no hydrogen 2.943 N/A GLU 154.A N.A GLU 154.A OE1.A no hydrogen 2.956 N/A ASP 156.A N VAL 152.A O no hydrogen 2.957 N/A ARG 157.A N ALA 153.A O no hydrogen 2.722 N/A ARG 157.A NE GLU 161.A OE1 no hydrogen 2.951 N/A ALA 158.A N GLU 154.A O.A no hydrogen 3.071 N/A ALA 158.A N GLU 154.A O.B no hydrogen 3.114 N/A TYR 159.A N GLN 155.A O no hydrogen 3.109 N/A LEU 160.A N ASP 156.A O no hydrogen 2.917 N/A GLU 161.A N ARG 157.A O no hydrogen 2.878 N/A GLY 162.A N ALA 158.A O no hydrogen 2.942 N/A CYS 164.A N TYR 159.A O no hydrogen 2.724 N/A GLU 166.A N.A GLY 162.A O no hydrogen 2.906 N/A GLU 166.A N.B GLY 162.A O no hydrogen 2.910 N/A TRP 167.A N THR 163.A O no hydrogen 2.893 N/A LEU 168.A N CYS 164.A O no hydrogen 2.879 N/A ARG 169.A N VAL 165.A O no hydrogen 2.981 N/A ARG 169.A NH1 GLY 107.A O no hydrogen 2.947 N/A ARG 170.A N GLU 166.A O.A no hydrogen 3.091 N/A ARG 170.A N GLU 166.A O.B no hydrogen 3.113 N/A ARG 170.A NE GLU 55.A OE2 no hydrogen 3.114 N/A ARG 170.A NH2 GLU 55.A OE2 no hydrogen 2.720 N/A TYR 171.A N TRP 167.A O no hydrogen 2.829 N/A TYR 171.A OH TYR 59.A OH no hydrogen 2.564 N/A LEU 172.A N LEU 168.A O no hydrogen 2.965 N/A GLU 173.A N ARG 169.A O no hydrogen 3.095 N/A ASN 174.A N ARG 170.A O no hydrogen 2.914 N/A GLY 175.A N TYR 171.A O no hydrogen 2.728 N/A LYS 176.A NZ.A GLU 173.A OE1 no hydrogen 3.183 N/A LYS 176.A NZ.A GLU 173.A OE2 no hydrogen 3.528 N/A LYS 176.A NZ.B GLU 173.A OE2 no hydrogen 2.971 N/A THR 178.A N GLY 175.A O no hydrogen 3.041 N/A THR 178.A OG1 GLY 175.A O no hydrogen 3.171 N/A LEU 179.A N GLY 175.A O no hydrogen 2.791 N/A GLU 180.A N LYS 176.A O.A no hydrogen 2.932 N/A GLU 180.A N LYS 176.A O.B no hydrogen 3.000 N/A ARG 181.A N THR 178.A O no hydrogen 3.182 N/A ARG 181.A NE ASP 183.A OD1 no hydrogen 2.771 N/A ARG 181.A NH1 ASP 177.A O no hydrogen 2.838 N/A ARG 181.A NH2 ASP 183.A OD2 no hydrogen 3.293 N/A ASP 183.A N TYR 209.A O no hydrogen 2.807 N/A LYS 186.A N LEU 206.A O no hydrogen 2.753 N/A HIS 188.A N TRP 204.A O no hydrogen 3.302 N/A THR 190.A N ARG 202.A O no hydrogen 2.856 N/A THR 190.A OG1 HIS 192.A NE2 no hydrogen 2.628 N/A THR 190.A OG1 ARG 202.A O no hydrogen 3.547 N/A HIS 192.A N THR 200.A O no hydrogen 2.820 N/A HIS 192.A NE2 THR 190.A OG1 no hydrogen 2.628 N/A ILE 194.A N GLU 198.A O no hydrogen 2.987 N/A SER 195.A N GLU 198.A O no hydrogen 3.265 N/A HIS 197.A N SER 195.A OG no hydrogen 3.116 N/A ALA 199.A N VAL 249.A O no hydrogen 2.939 N/A THR 200.A N HIS 192.A O no hydrogen 2.823 N/A LEU 201.A N VAL 247.A O no hydrogen 2.868 N/A ARG 202.A N THR 190.A O no hydrogen 2.927 N/A CYS 203.A N ALA 245.A O no hydrogen 2.740 N/A TRP 204.A N HIS 188.A O no hydrogen 2.793 N/A TRP 204.A NE1 THR 190.A OG1 no hydrogen 2.987 N/A ALA 205.A N LYS 243.A O no hydrogen 2.927 N/A LEU 206.A N LYS 186.A O no hydrogen 2.892 N/A PHE 208.A N PHE 241.A O no hydrogen 3.335 N/A TYR 209.A N ASP 183.A O no hydrogen 2.950 N/A TYR 209.A OH THR 31.A OG1 no hydrogen 2.761 N/A ALA 211.A N ASP 30.A OD2 no hydrogen 2.769 N/A THR 214.A N GLN 262.A O no hydrogen 2.963 N/A THR 216.A N HIS 260.A O no hydrogen 2.934 N/A TRP 217.A NE1 ALA 245.A O no hydrogen 2.845 N/A GLN 218.A N THR 258.A O no hydrogen 2.823 N/A ARG 219.A N GLU 222.A O no hydrogen 2.907 N/A ARG 219.A NH1 GLU 253.A OE1 no hydrogen 2.580 N/A ARG 219.A NH1 TYR 257.A OH no hydrogen 2.664 N/A ARG 219.A NH2 GLU 253.A OE1 no hydrogen 3.141 N/A ASP 220.A N ARG 256.A O no hydrogen 2.929 N/A GLU 222.A N ARG 219.A O no hydrogen 3.013 N/A GLN 224.A N TRP 217.A O no hydrogen 2.994 N/A GLN 224.A NE2 GLU 222.A O no hydrogen 3.602 N/A GLN 224.A NE2 ASP 223.A O no hydrogen 3.376 N/A ASP 227.A N GLN 224.A O no hydrogen 3.072 N/A THR 228.A N THR 225.A O no hydrogen 3.324 N/A THR 228.A OG1 GLN 224.A O no hydrogen 2.634 N/A GLU 229.A N ALA 246.A O no hydrogen 2.780 N/A VAL 231.A N TRP 244.A O no hydrogen 3.226 N/A ARG 234.A N GLN 242.A O no hydrogen 2.916 N/A ARG 234.A NE GLN 242.A OE1 no hydrogen 2.874 N/A ARG 234.A NH2 GLN 242.A OE1 no hydrogen 3.085 N/A ALA 236.A N THR 240.A O no hydrogen 2.874 N/A ARG 239.A NE.B ASP 183.A OD2 no hydrogen 3.327 N/A ARG 239.A NH1.A ASP 183.A OD2 no hydrogen 2.824 N/A ARG 239.A NH1.B THR 178.A O no hydrogen 3.022 N/A ARG 239.A NH2.A THR 178.A O no hydrogen 2.418 N/A ARG 239.A NH2.B THR 178.A O no hydrogen 3.384 N/A ARG 239.A NH2.B ARG 181.A O no hydrogen 2.884 N/A ARG 239.A NH2.B ASP 183.A OD2 no hydrogen 2.965 N/A THR 240.A N ASP 238.A OD1 no hydrogen 3.029 N/A THR 240.A OG1 ASP 238.A OD1 no hydrogen 2.627 N/A PHE 241.A N PHE 208.A O no hydrogen 2.824 N/A GLN 242.A N ARG 234.A O no hydrogen 2.831 N/A LYS 243.A N ALA 205.A O no hydrogen 2.985 N/A LYS 243.A NZ VAL 231.A O no hydrogen 2.817 N/A LYS 243.A NZ THR 233.A OG1 no hydrogen 3.024 N/A ALA 245.A N CYS 203.A O no hydrogen 3.009 N/A ALA 246.A N GLU 229.A O no hydrogen 2.824 N/A VAL 247.A N LEU 201.A O no hydrogen 2.983 N/A VAL 249.A N ALA 199.A O no hydrogen 2.812 N/A SER 251.A N HIS 197.A O no hydrogen 3.050 N/A SER 251.A OG ASP 196.A O no hydrogen 2.655 N/A GLU 253.A N PRO 250.A O no hydrogen 2.987 N/A GLU 254.A N GLU 254.A OE1 no hydrogen 2.713 N/A GLN 255.A NE2 TRP 274.A O no hydrogen 3.022 N/A ARG 256.A N GLU 253.A O no hydrogen 3.042 N/A ARG 256.A NE ASP 220.A OD1 no hydrogen 2.882 N/A ARG 256.A NE ASP 220.A OD2 no hydrogen 3.274 N/A ARG 256.A NH2 ASP 220.A OD2 no hydrogen 2.568 N/A TYR 257.A N GLU 254.A O no hydrogen 3.052 N/A THR 258.A N GLN 218.A O no hydrogen 2.920 N/A THR 258.A OG1 HIS 260.A NE2 no hydrogen 2.923 N/A CYS 259.A N LEU 272.A O no hydrogen 2.770 N/A CYS 259.A SG THR 216.A O no hydrogen 3.714 N/A HIS 260.A N THR 216.A O no hydrogen 2.695 N/A HIS 260.A NE2 THR 258.A OG1 no hydrogen 2.923 N/A VAL 261.A N LEU 270.A O no hydrogen 3.133 N/A GLN 262.A N THR 214.A O no hydrogen 2.892 N/A HIS 263.A NE2 PRO 210.A O no hydrogen 2.942 N/A GLY 265.A N HIS 263.A ND1 no hydrogen 2.857 N/A LEU 266.A N HIS 263.A O no hydrogen 2.674 N/A LEU 270.A N VAL 261.A O no hydrogen 3.133 N/A LEU 272.A N CYS 259.A O no hydrogen 2.871 N/A