1 29 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 GGuGACCuCC CGGGAGCGGG GGACCACUa 3 5BU 8 5BU 29 A23 LOOP1 13 16 Crystallography ? ? Angstroms 1 G P 10.665 -9.594 6.124 O3' 14.306 -13.400 6.457 2 G P 13.975 -14.346 7.711 O3' 17.711 -16.886 10.200 3 u P 16.766 -17.906 10.982 O3' 17.913 -18.975 15.876 4 G P 16.660 -19.740 16.449 O3' 15.806 -19.298 21.607 5 A P 14.344 -19.754 22.078 O3' 12.184 -18.256 26.607 6 C P 11.002 -19.332 26.768 O3' 6.094 -17.870 27.556 7 C P 5.087 -19.076 27.214 O3' 0.190 -17.785 25.715 8 u P -0.654 -19.111 25.477 O3' -4.238 -19.565 21.866 9 C P -4.553 -21.142 21.886 O3' -6.554 -23.153 17.408 10 C P -6.580 -24.754 17.408 O3' -6.389 -27.534 13.177 11 C P -6.357 -29.081 13.615 O3' -4.521 -32.764 10.896 12 G P -4.641 -34.035 11.873 O3' -1.590 -37.915 11.874 13 G P -2.223 -38.853 12.987 O3' 0.499 -41.933 15.989 14 G P -0.649 -42.571 16.921 O3' 0.480 -41.430 21.747 15 A P 1.066 -39.964 21.860 O3' 5.519 -38.017 24.786 16 G P 5.951 -36.582 24.276 O3' 10.751 -34.965 24.460 17 C P 10.520 -33.605 23.684 O3' 11.354 -33.391 17.912 18 G P 11.350 -32.072 17.005 O3' 10.476 -32.083 12.058 19 G P 10.664 -30.529 11.818 O3' 8.136 -28.271 8.236 20 G P 8.519 -26.734 8.258 O3' 5.024 -22.364 7.827 21 G P 5.257 -20.810 8.179 O3' 1.942 -17.213 8.200 22 G P 2.821 -15.934 8.693 O3' 0.749 -12.344 11.698 23 A P 1.700 -11.143 12.199 O3' 1.280 -8.587 16.954 24 C P 2.356 -7.426 16.837 O3' 5.014 -5.993 20.966 25 C P 6.223 -5.137 20.318 O3' 10.731 -4.943 23.017 26 A P 12.026 -4.333 22.287 O3' 16.796 -5.774 23.440 27 C P 17.577 -4.574 22.720 O3' 22.079 -5.632 20.291 28 U P 22.252 -4.281 19.424 O3' 23.617 -4.777 14.308 29 a P 23.645 -3.331 13.574 O3' 25.751 -2.687 9.232 1 28 W W c 2 27 + + c 3 26 - - c 4 25 + + c 5 24 W W c 6 23 W W c 7 22 + + c 8 21 W W c 9 20 + + c 10 19 + + c 11 18 + + c 12 17 + + c 13 16 ! ! ! 1 28 12 SG1 13 16 SG2 29 29 1 5.470 24.271 2 5.470 64.722 3 5.470 105.174 4 5.470 145.626 5 5.470 186.077 6 5.470 226.529 7 5.470 266.980 8 5.470 307.432 9 5.470 347.883 10 5.470 388.335 11 5.470 428.786 12 5.470 469.238 13 0.000 515.312 14 30.813 550.000 15 77.211 550.000 16 108.024 515.312 17 102.554 469.238 18 102.554 428.786 19 102.554 388.335 20 102.554 347.883 21 102.554 307.432 22 102.554 266.980 23 102.554 226.529 24 102.554 186.077 25 102.554 145.626 26 102.554 105.174 27 102.554 64.722 28 102.554 24.271 29 102.554 0.000