1 29 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 CAUACUUGAA ACUGUAAGGU UGGCGUAUG LOOP1 15 16 Crystallography ? ? Angstroms 1 C O3' 22.457 13.905 9.196 2 A P 23.788 13.904 8.294 O3' 25.413 16.849 4.733 3 U P 26.946 16.592 4.325 O3' 31.136 20.473 3.146 4 A P 32.581 19.790 2.995 O3' 36.840 21.911 4.402 5 C P 37.851 20.732 3.986 O3' 42.098 19.966 6.787 6 U P 42.763 18.556 6.408 O3' 43.487 14.329 10.333 7 U P 44.134 12.933 9.880 O3' 43.177 8.891 13.477 8 G P 43.002 8.885 15.099 O3' 38.545 5.950 17.220 9 A P 38.286 4.593 18.002 O3' 33.575 3.153 19.673 10 A P 32.909 1.951 20.485 O3' 28.135 0.396 20.485 11 A P 26.975 -0.728 20.583 O3' 25.687 -4.776 18.691 12 C P 25.295 -6.336 18.906 O3' 23.124 -9.868 15.442 13 U P 23.161 -11.303 16.162 O3' 24.132 -15.505 12.957 14 G P 23.849 -16.562 14.142 O3' 28.023 -20.139 12.958 15 U P 28.854 -21.400 13.523 O3' 33.505 -23.747 12.205 16 A P 34.624 -23.567 11.035 O3' 38.836 -24.276 13.965 17 A P 39.638 -22.894 14.141 O3' 39.910 -18.365 11.645 18 G P 40.705 -16.987 11.597 O3' 38.437 -13.391 7.746 19 G P 38.473 -11.826 7.388 O3' 34.373 -10.288 4.335 20 U P 34.470 -8.714 4.019 O3' 30.112 -5.718 3.438 21 U P 30.572 -4.186 3.302 O3' 28.187 -0.096 5.418 22 G P 29.126 0.908 4.588 O3' 30.751 4.268 8.823 23 G P 31.324 5.759 8.722 O3' 33.213 8.598 13.118 24 C P 32.207 8.685 14.393 O3' 33.610 10.367 19.305 25 G P 33.014 11.856 19.457 O3' 35.913 16.017 20.806 26 U P 34.879 17.250 20.860 O3' 36.340 22.109 20.069 27 A P 34.947 22.867 20.356 O3' 33.927 26.864 16.787 28 U P 32.498 27.562 17.027 O3' 29.047 29.199 13.384 29 G P 27.590 29.533 13.991 O3' 23.092 29.078 11.666 16 syn 1 29 + + c 2 28 - - c 3 27 - - c 4 26 - - c 5 25 + + c 9 22 H S t 10 21 - - c 11 20 - - c 12 19 + + c 13 18 W W c 14 17 S H t 6 24 ! ! ! 15 16 ! ! ! 16 17 ! ! ! 1 29 6 9 22 6 SG1 7 8 SG2 15 16 SG3 23 23 1 233.407 0.000 2 195.761 19.860 3 158.115 39.720 4 120.468 59.580 5 82.822 79.439 6 45.176 99.299 7 22.588 111.215 8 0.000 123.131 9 38.167 278.482 10 38.167 321.046 11 38.167 363.609 12 38.167 406.173 13 38.167 448.737 14 38.167 491.300 15 58.227 550.000 16 120.260 550.000 17 140.320 491.300 18 140.320 448.737 19 140.320 406.173 20 140.320 363.609 21 140.320 321.046 22 140.320 278.482 23 70.251 201.566 24 92.839 189.650 25 130.486 169.791 26 168.132 149.931 27 205.778 130.071 28 243.424 110.211 29 281.071 90.351