1 30 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 30 GGACAGCUGU CCCUUCGGGG ACAGCUGUCC LOOP1 15 16 Crystallography ? ? Angstroms 1 G O3' 4.018 -0.756 27.186 2 G P 4.374 -2.155 27.903 O3' 7.034 -1.408 32.800 3 A P 7.422 -2.374 34.034 O3' 9.967 -0.945 38.788 4 C P 10.147 -2.231 39.744 O3' 8.290 -2.048 44.691 5 A P 8.292 -3.401 45.570 O3' 4.818 -6.691 48.076 6 G P 5.026 -8.288 47.992 O3' 1.031 -11.374 50.839 7 C P 1.354 -12.954 50.807 O3' -2.300 -16.686 48.256 8 U P -1.811 -18.143 47.768 O3' -4.044 -21.532 44.625 9 G P -2.893 -22.630 44.878 O3' -1.654 -25.464 40.207 10 U P -0.373 -26.442 40.233 O3' 2.218 -26.680 35.239 11 C P 3.582 -27.508 35.013 O3' 8.494 -25.167 33.789 12 C P 9.820 -26.071 33.627 O3' 14.852 -23.220 33.406 13 C P 16.373 -23.751 33.360 O3' 19.706 -19.398 33.227 14 U P 20.831 -20.055 32.280 O3' 25.657 -18.418 34.079 15 U P 27.066 -19.155 33.808 O3' 30.604 -17.374 38.189 16 C P 30.989 -18.468 39.309 O3' 28.295 -20.228 43.950 17 G P 29.287 -20.855 45.059 O3' 26.009 -19.382 49.673 18 G P 24.764 -19.978 50.513 O3' 19.754 -19.217 49.290 19 G P 18.165 -19.430 49.467 O3' 14.773 -16.173 45.966 20 G P 13.259 -16.248 46.518 O3' 11.302 -13.823 41.667 21 A P 9.738 -13.428 41.609 O3' 8.560 -13.356 36.091 22 C P 7.415 -12.219 36.077 O3' 3.815 -13.498 32.055 23 A P 3.006 -12.107 31.943 O3' -2.940 -12.565 32.258 24 G P -3.718 -11.230 32.722 O3' -8.281 -11.984 35.740 25 C P -8.910 -10.643 36.379 O3' -10.461 -9.062 40.505 26 U P -10.619 -7.487 40.203 O3' -10.249 -3.841 44.104 27 G P -10.346 -2.406 43.373 O3' -6.213 0.949 44.641 28 U P -5.733 2.383 44.082 O3' -2.426 5.470 45.278 29 C P -3.281 6.501 44.382 O3' 1.006 8.952 41.238 30 C P 0.749 10.473 40.767 O3' 2.128 11.741 35.398 16 syn 1 30 + + c 2 29 + + c 3 28 - - c 4 27 + + c 4 28 W W c 5 26 - - c 6 25 + + c 7 24 + + c 8 23 - - c 9 22 + + c 10 21 - - c 11 20 + + c 12 19 + + c 13 18 + + c 14 17 W W c 14 18 ! ! ! 1 30 14 SG1 15 16 1 0.000 0.000 2 0.000 38.250 3 0.000 76.500 4 0.000 114.750 5 0.000 153.000 6 0.000 191.250 7 0.000 229.500 8 0.000 267.750 9 0.000 305.999 10 0.000 344.249 11 0.000 382.499 12 0.000 420.749 13 0.000 458.999 14 0.000 497.249 15 18.027 550.000 16 73.773 550.000 17 91.800 497.249 18 91.800 458.999 19 91.800 420.749 20 91.800 382.499 21 91.800 344.249 22 91.800 305.999 23 91.800 267.750 24 91.800 229.500 25 91.800 191.250 26 91.800 153.000 27 91.800 114.750 28 91.800 76.500 29 91.800 38.250 30 91.800 0.000