1 22 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 GAGACAUUGC ACCCGGAGUC UC Crystallography ? ? Angstroms 1 G O3' 22.768 -14.290 -6.855 2 A P 21.385 -15.087 -6.654 O3' 20.518 -18.530 -10.693 3 G P 19.084 -19.253 -10.584 O3' 18.688 -24.918 -11.578 4 A P 17.204 -25.529 -11.461 O3' 16.654 -30.757 -9.040 5 C P 15.140 -31.248 -8.800 O3' 14.587 -33.666 -3.673 6 A P 13.152 -34.025 -3.037 O3' 10.360 -31.966 1.709 7 U P 8.944 -32.726 1.615 O3' 5.268 -29.064 4.397 8 U P 3.949 -29.982 4.493 O3' -0.875 -27.645 3.557 9 G P -1.127 -26.970 4.998 O3' -0.035 -21.186 6.014 10 C P -0.816 -19.804 5.740 O3' -0.859 -14.379 7.178 11 A P 0.589 -13.807 7.585 O3' 4.094 -11.369 4.319 12 C P 4.343 -9.882 4.878 O3' 3.598 -5.555 2.778 13 C P 3.842 -4.719 4.131 O3' 6.500 -4.405 8.216 14 C P 7.522 -3.165 8.113 O3' 13.275 -4.571 8.138 15 G P 13.995 -3.150 8.368 O3' 18.468 -1.370 5.368 16 G P 18.645 0.180 4.971 O3' 21.527 1.643 0.493 17 A P 21.789 3.226 0.618 O3' 21.309 5.726 -3.772 18 G P 22.264 6.765 -2.997 O3' 25.648 7.739 -5.717 19 U P 26.637 6.482 -5.539 O3' 32.197 7.984 -5.709 20 C P 33.434 6.978 -5.481 O3' 37.337 7.593 -2.528 21 U P 38.175 6.228 -2.356 O3' 40.777 4.409 2.300 22 C P 41.419 2.946 2.502 O3' 42.284 0.424 6.682 10 11 ! ! ! SG1 6 12 SG2 17 17 1 0.000 190.472 2 0.000 234.316 3 0.000 278.161 4 0.000 322.006 5 0.000 365.851 6 0.000 392.158 7 0.000 418.465 8 0.000 444.772 9 0.000 471.079 10 0.000 497.386 11 0.000 523.693 12 0.000 550.000 13 229.937 343.176 14 265.446 317.457 15 300.956 291.738 16 336.465 266.019 17 357.770 250.587 18 429.579 54.634 19 387.916 40.975 20 346.253 27.317 21 304.589 13.658 22 262.926 0.000 1 22 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 GAGACAUU GCACCCGGAG UCUC Crystallography ? ? Angstroms 1 G O3' 26.732 -2.902 6.838 2 A P 26.142 -1.418 6.636 O3' 27.601 1.818 10.677 3 G P 26.926 3.276 10.568 O3' 30.132 7.960 11.565 4 A P 29.348 9.361 11.446 O3' 32.168 13.801 9.030 5 C P 31.286 15.127 8.789 O3' 32.359 17.365 3.663 6 A P 31.457 18.539 3.028 O3' 27.993 18.664 -1.719 7 U P 27.354 20.138 -1.624 O3' 22.200 19.551 -4.406 8 U P 21.737 21.091 -4.501 O3' 16.506 22.257 -3.573 9 G P 15.892 21.885 -5.015 O3' 13.153 16.677 -6.035 10 C P 11.686 16.073 -5.764 O3' 8.278 11.855 -7.196 11 A P 9.056 10.507 -7.604 O3' 10.286 6.414 -4.348 12 C P 9.554 5.095 -4.905 O3' 6.275 2.166 -2.809 13 C P 5.959 1.359 -4.164 O3' 7.849 -0.539 -8.244 14 C P 7.880 -2.144 -8.139 O3' 13.262 -4.615 -8.162 15 G P 12.943 -6.177 -8.394 O3' 15.340 -10.351 -5.394 16 G P 14.514 -11.675 -4.998 O3' 15.860 -14.612 -0.511 17 A P 15.087 -16.017 -0.644 O3' 13.153 -17.678 3.743 18 G P 13.257 -19.084 2.966 O3' 15.300 -21.957 5.685 19 U P 16.856 -21.583 5.510 O3' 20.285 -26.216 5.680 20 C P 21.879 -26.194 5.453 O3' 24.555 -29.098 2.501 21 U P 26.059 -28.547 2.328 O3' 29.233 -28.739 -2.325 22 C P 30.644 -27.990 -2.526 O3' 32.891 -26.551 -6.705 10 11 ! ! ! SG1 6 12 SG2 17 17 1 230.146 99.992 2 271.809 113.650 3 313.472 127.309 4 355.135 140.967 5 396.799 154.626 6 547.330 243.221 7 526.024 258.653 8 504.718 274.084 9 483.413 289.515 10 462.107 304.947 11 440.802 320.378 12 419.496 335.810 13 398.190 351.241 14 362.681 376.960 15 327.172 402.679 16 291.663 428.398 17 105.228 392.158 18 105.228 365.851 19 105.228 322.006 20 105.228 278.161 21 105.228 234.316 22 105.228 190.472 1 22 + + c 2 21 - - c 3 20 + + c 4 19 - - c 5 18 + + c 13 16 + + c 14 15 + + c 15 14 + + c 16 13 + + c 18 5 + + c 19 4 - - c 20 3 + + c 21 2 - - c 22 1 + + c 1 22 5 13 16 4 18 5 5