1 23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 CUuGCUGAAG UGCACACAGC AAG 3 5BU Crystallography ? ? Angstroms 1 C O3' 30.921 61.879 29.037 2 U P 31.352 63.017 30.089 O3' 28.278 64.740 33.828 3 u P 29.207 65.810 34.572 O3' 28.951 66.404 39.705 4 G P 30.123 67.407 40.137 O3' 33.267 66.267 44.451 5 C P 34.647 67.076 44.635 O3' 38.557 65.019 47.450 6 U P 39.721 66.132 47.363 O3' 44.827 64.450 47.154 7 G P 45.895 65.574 46.708 O3' 50.175 64.547 43.949 8 A P 50.943 65.949 43.768 O3' 49.532 70.169 44.269 9 A P 49.997 71.121 43.035 O3' 53.644 76.113 44.207 10 G P 53.169 77.636 44.029 O3' 49.511 77.819 47.716 11 U P 48.130 77.351 47.057 O3' 43.607 79.298 47.884 12 G P 42.614 78.349 47.044 O3' 38.227 79.725 45.242 13 C P 37.718 78.393 44.514 O3' 34.643 78.285 40.485 14 A P 34.670 76.698 40.200 O3' 34.717 75.101 35.415 15 C P 34.971 73.602 34.895 O3' 37.594 71.309 30.514 16 A P 37.544 69.738 30.814 O3' 41.340 67.250 28.576 17 C P 41.052 65.705 28.921 O3' 44.620 62.234 29.831 18 A P 43.725 60.967 30.246 O3' 45.449 57.255 33.398 19 G P 44.270 56.186 33.641 O3' 43.611 53.551 37.988 20 C P 42.178 52.820 37.919 O3' 39.305 52.255 42.368 21 A P 37.832 51.685 42.065 O3' 33.679 52.461 44.870 22 A P 32.589 51.502 44.181 O3' 27.715 52.668 43.617 23 G P 27.259 51.468 42.641 O3' 23.595 52.205 39.184 1 23 + + c 2 22 - - c 3 21 - - c 4 20 + + c 5 19 + + c 6 18 - - c 7 17 + + c 1 23 7 SG1 8 9 SG2 16 16 1 78.571 0.000 2 78.571 26.190 3 78.571 52.381 4 78.571 78.571 5 78.571 104.762 6 78.571 130.952 7 78.571 157.143 8 94.286 157.143 9 110.000 157.143 10 15.714 340.476 11 15.714 314.286 12 15.714 288.095 13 15.714 261.905 14 15.714 235.714 15 15.714 209.524 16 0.000 157.143 17 15.714 157.143 18 15.714 130.952 19 15.714 104.762 20 15.714 78.571 21 15.714 52.381 22 15.714 26.190 23 15.714 0.000 1 23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 CUuGCUG AAGUGCACAC AGCAAG 3 5BU Crystallography ? ? Angstroms 1 C O3' 48.058 101.418 46.845 2 U P 48.106 100.095 45.923 O3' 46.776 100.701 40.744 3 u P 47.153 99.351 39.941 O3' 48.631 99.240 35.041 4 G P 48.899 97.687 34.714 O3' 52.273 96.059 31.125 5 C P 52.344 94.453 31.150 O3' 56.581 91.741 30.054 6 U P 56.120 90.233 30.343 O3' 59.631 86.731 32.398 7 G P 59.002 85.330 32.902 O3' 61.072 82.613 36.812 8 A P 60.293 81.227 37.090 O3' 56.128 79.269 35.568 9 A P 55.774 78.503 36.941 O3' 54.049 72.917 35.725 10 G P 52.511 72.445 35.633 O3' 51.898 74.362 30.883 11 U P 51.578 75.885 31.267 O3' 48.155 78.708 28.741 12 G P 48.216 80.204 29.319 O3' 44.719 83.713 29.388 13 C P 45.440 84.911 30.185 O3' 42.648 88.246 32.853 14 A P 43.776 89.133 33.591 O3' 42.765 91.097 38.293 15 C P 44.165 91.700 38.825 O3' 45.251 91.738 43.908 16 A P 46.688 92.429 44.141 O3' 50.026 91.208 47.933 17 C P 51.295 92.177 47.684 O3' 56.041 90.699 48.943 18 A P 56.937 91.965 48.527 O3' 61.766 91.910 46.874 19 G P 62.144 93.429 46.494 O3' 65.411 94.418 43.069 20 C P 65.557 95.979 42.731 O3' 65.709 98.794 37.835 21 A P 65.599 100.346 38.206 O3' 62.642 103.863 34.786 22 A P 62.546 105.218 35.632 O3' 58.192 107.882 34.586 23 G P 58.230 109.165 35.552 O3' 53.857 111.471 36.657 1 23 + + c 2 22 - - c 3 21 - - c 4 20 + + c 5 19 + + c 6 18 - - c 7 17 + + c 1 23 7 SG1 8 9 SG2 16 16 1 15.714 550.000 2 15.714 523.810 3 15.714 497.619 4 15.714 471.429 5 15.714 445.238 6 15.714 419.048 7 15.714 392.857 8 110.000 209.524 9 94.286 209.524 10 78.571 209.524 11 78.571 235.714 12 78.571 261.905 13 78.571 288.095 14 78.571 314.286 15 78.571 340.476 16 94.286 340.476 17 78.571 392.857 18 78.571 419.048 19 78.571 445.238 20 78.571 471.429 21 78.571 497.619 22 78.571 523.810 23 78.571 550.000 10 15 + + c 11 14 - - c 12 13 + + c 13 12 + + c 14 11 - - c 15 10 + + c 10 15 6