1 21 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 CGUACGCGUC ACGCGUACGU U Crystallography ? ? Angstroms 1 C P 13.863 -48.229 39.898 O3' 9.254 -49.591 37.936 2 G P 9.255 -50.567 36.653 O3' 5.738 -51.042 33.420 3 U P 6.063 -52.201 32.365 O3' 5.567 -52.751 26.746 4 A P 6.246 -54.191 26.580 O3' 8.744 -55.070 22.206 5 C P 9.594 -56.420 22.390 O3' 13.933 -56.868 19.556 6 G P 14.889 -58.134 19.828 O3' 19.950 -58.167 18.730 7 C P 20.381 -59.661 19.145 O3' 25.068 -61.040 20.701 8 G P 24.838 -62.587 21.063 O3' 27.154 -64.793 25.262 9 U P 26.590 -66.297 25.411 O3' 25.881 -68.244 30.185 10 C P 25.094 -69.625 30.457 O3' 23.091 -70.638 35.255 11 A P 22.499 -72.128 35.278 O3' 18.036 -73.768 37.630 12 C P 17.297 -75.117 37.148 O3' 12.176 -76.152 38.112 13 G P 11.854 -77.604 37.514 O3' 7.214 -78.950 35.772 14 C P 7.384 -80.441 35.201 O3' 4.746 -82.191 31.176 15 G P 5.338 -83.619 30.743 O3' 5.985 -85.781 26.498 16 U P 6.833 -87.083 26.915 O3' 10.082 -89.107 23.411 17 A P 11.054 -90.308 23.875 O3' 15.168 -91.497 21.279 18 C P 16.019 -92.747 21.822 O3' 21.651 -93.417 22.676 19 G P 21.670 -94.820 23.448 O3' 25.571 -95.603 26.661 20 U P 25.190 -97.076 27.173 O3' 26.599 -97.065 32.942 21 U P 27.165 -95.549 33.017 O3' 31.915 -93.146 35.149 SG1 20 21 1 0.000 32.353 2 0.000 59.314 3 0.000 86.275 4 0.000 113.235 5 0.000 140.196 6 0.000 167.157 7 0.000 194.118 8 0.000 221.078 9 0.000 248.039 10 0.000 275.000 11 0.000 301.961 12 0.000 328.922 13 0.000 355.882 14 0.000 382.843 15 0.000 409.804 16 0.000 436.765 17 0.000 463.725 18 0.000 490.686 19 0.000 517.647 20 0.000 533.824 21 0.000 550.000 1 21 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 CGUACGCGU CACGCGUACG UU Crystallography ? ? Angstroms 1 C P 19.265 -85.359 39.449 O3' 23.804 -84.538 37.471 2 G P 23.659 -83.460 36.298 O3' 26.676 -83.316 32.272 3 U P 26.191 -81.953 31.571 O3' 26.252 -81.335 26.718 4 A P 25.596 -79.940 26.262 O3' 21.996 -79.869 21.835 5 C P 21.615 -78.314 21.698 O3' 16.672 -77.357 19.046 6 G P 16.229 -75.885 19.508 O3' 11.063 -75.357 19.081 7 C P 10.884 -73.809 19.494 O3' 6.756 -72.111 21.868 8 G P 7.098 -70.624 22.369 O3' 4.831 -68.849 26.464 9 U P 5.270 -67.350 26.829 O3' 7.488 -65.115 31.667 10 C P 8.455 -63.945 32.191 O3' 9.933 -62.831 36.709 11 A P 10.454 -61.358 36.360 O3' 15.339 -59.684 37.717 12 C P 16.092 -58.386 37.130 O3' 21.041 -57.165 37.561 13 G P 21.469 -55.837 36.770 O3' 25.926 -54.676 34.902 14 C P 25.630 -53.186 34.377 O3' 27.053 -50.900 30.219 15 G P 26.216 -49.531 30.289 O3' 24.623 -47.325 26.032 16 U P 23.584 -46.113 25.869 O3' 19.875 -44.780 21.867 17 A P 19.220 -43.448 22.453 O3' 14.597 -42.644 20.490 18 C P 14.126 -41.350 21.310 O3' 9.127 -40.901 22.531 19 G P 9.027 -39.613 23.483 O3' 5.485 -38.918 26.948 20 U P 5.707 -37.551 27.776 O3' 4.081 -37.292 33.271 21 U P 4.430 -38.815 33.680 O3' 1.055 -41.613 36.576 SG1 20 21 1 64.706 517.647 2 64.706 490.686 3 64.706 463.725 4 64.706 436.765 5 64.706 409.804 6 64.706 382.843 7 64.706 355.882 8 64.706 328.922 9 64.706 301.961 10 64.706 275.000 11 64.706 248.039 12 64.706 221.078 13 64.706 194.118 14 64.706 167.157 15 64.706 140.196 16 64.706 113.235 17 64.706 86.275 18 64.706 59.314 19 64.706 32.353 20 64.706 16.176 21 64.706 0.000 1 19 + + c 2 18 + + c 3 17 - - c 4 16 - - c 5 15 + + c 6 14 + + c 7 13 + + c 8 12 + + c 9 11 - - c 11 9 - - c 12 8 + + c 13 7 + + c 14 6 + + c 15 5 + + c 16 4 - - c 17 3 - - c 18 2 + + c 19 1 + + c 10 10 ! ! ! 1 19 19