1 21 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 GGCCGAUGGU AGUGUGGGGU C Crystallography ? ? Angstroms 1 G O3' 62.591 -18.318 -57.978 2 G P 62.320 -17.675 -56.529 O3' 62.438 -18.722 -52.120 3 C P 62.148 -17.159 -51.872 O3' 64.285 -15.222 -47.074 4 C P 64.590 -13.649 -46.919 O3' 68.314 -11.539 -44.241 5 G P 67.519 -10.144 -44.212 O3' 70.127 -5.894 -46.355 6 A P 69.578 -4.629 -47.181 O3' 74.360 -1.675 -46.325 7 U P 74.177 -0.099 -46.588 O3' 76.737 2.838 -49.465 8 G P 75.717 4.071 -49.308 O3' 74.540 6.632 -54.056 9 G P 73.659 7.829 -53.445 O3' 68.638 7.962 -56.448 10 U P 67.215 8.614 -56.076 O3' 62.234 7.259 -56.583 11 A P 61.424 8.517 -55.994 O3' 57.026 7.269 -52.547 12 G P 56.313 8.535 -51.858 O3' 55.749 9.629 -46.908 13 U P 55.107 11.067 -47.233 O3' 56.413 14.881 -43.332 14 G P 56.333 16.470 -43.573 O3' 60.204 19.423 -41.063 15 U P 59.829 20.983 -41.135 O3' 64.165 24.256 -41.775 16 G P 63.706 25.794 -41.871 O3' 66.930 28.781 -45.252 17 G P 66.393 30.293 -45.362 O3' 67.087 32.413 -50.477 18 G P 66.405 33.824 -50.842 O3' 64.596 34.016 -56.086 19 G P 64.089 35.474 -56.532 O3' 59.737 37.432 -57.657 20 U P 60.029 38.994 -57.409 O3' 56.505 41.134 -53.612 21 C P 56.130 40.275 -52.304 O3' 51.637 37.979 -50.551 SG1 20 21 1 68.750 0.000 2 68.750 28.646 3 68.750 57.292 4 68.750 85.938 5 68.750 114.583 6 68.750 143.229 7 68.750 171.875 8 68.750 200.521 9 68.750 229.167 10 68.750 257.812 11 68.750 286.458 12 68.750 315.104 13 68.750 343.750 14 68.750 372.396 15 68.750 401.042 16 68.750 429.687 17 68.750 458.333 18 68.750 486.979 19 68.750 515.625 20 68.750 532.812 21 68.750 550.000 1 20 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 UCCCCAUGC GAGAGUAGGC C Crystallography ? ? Angstroms 1 U P 52.109 37.880 -49.016 O3' 47.990 34.437 -47.644 2 C P 47.042 33.165 -47.941 O3' 47.704 30.700 -52.520 3 C P 48.332 29.222 -52.423 O3' 51.586 27.198 -56.307 4 C P 52.303 25.785 -56.025 O3' 57.050 24.935 -58.723 5 C P 57.694 23.495 -58.406 O3' 63.177 23.943 -59.066 6 A P 63.777 22.454 -59.149 O3' 68.220 21.916 -56.206 7 U P 68.742 20.401 -56.085 O3' 71.026 18.757 -51.525 8 G P 71.148 17.162 -51.344 O3' 71.461 16.190 -45.894 9 C P 72.087 14.710 -45.816 O3' 69.530 11.555 -42.092 10 G P 70.226 10.121 -42.307 O3' 67.685 6.039 -43.865 11 A P 68.808 5.029 -44.415 O3' 66.029 1.012 -43.216 12 G P 67.077 -0.170 -43.505 O3' 63.666 -4.463 -45.482 13 A P 64.378 -5.702 -46.222 O3' 62.777 -7.836 -50.780 14 G P 63.955 -8.908 -50.997 O3' 66.113 -8.655 -56.344 15 U P 67.543 -9.261 -56.761 O3' 71.167 -8.124 -59.576 16 A P 71.849 -9.548 -59.260 O3' 77.235 -9.007 -58.765 17 G P 77.582 -10.569 -58.905 O3' 79.863 -12.704 -54.280 18 G P 79.851 -14.292 -54.019 O3' 79.470 -16.982 -50.287 19 C P 79.841 -18.158 -51.319 O3' 77.245 -22.963 -50.060 20 C P 77.179 -24.059 -51.236 O3' 73.544 -27.676 -52.353 SG1 1 1 1 0.000 532.812 2 0.000 515.625 3 0.000 486.979 4 0.000 458.333 5 0.000 429.687 6 0.000 401.042 7 0.000 372.396 8 0.000 343.750 9 0.000 315.104 10 0.000 286.458 11 0.000 257.812 12 0.000 229.167 13 0.000 200.521 14 0.000 171.875 15 0.000 143.229 16 0.000 114.583 17 0.000 85.937 18 0.000 57.292 19 0.000 28.646 20 0.000 0.000 1 20 + + c 2 19 + + c 3 18 + + c 4 17 + + c 5 16 S H t 6 15 H W t 7 14 H W t 9 12 W H t 10 11 W H t 11 10 H S t 12 9 + + c 13 8 W W c 14 7 W W c 15 6 - - c 16 5 + + c 17 4 + + c 18 3 + + c 8 13 ! ! ! 19 2 ! ! ! 1 20 19