1 27 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 UGCUCCUAGU ACGAGAGGAC CGGAGUG LOOP1 14 15 Crystallography ? ? Angstroms 1 U O3' -26.981 52.834 -4.075 2 G P -26.121 51.612 -4.642 O3' -28.410 48.743 -8.676 3 C P -27.282 48.025 -9.560 O3' -26.990 48.052 -14.451 4 U P -25.547 47.507 -14.922 O3' -22.147 50.368 -18.591 5 C P -20.712 49.642 -18.563 O3' -16.795 52.862 -20.252 6 C P -15.309 52.265 -20.010 O3' -11.139 55.119 -19.457 7 U P -10.000 53.979 -19.345 O3' -6.326 54.075 -15.765 8 A P -5.425 52.737 -15.779 O3' -8.187 49.156 -19.514 9 G P -7.721 48.895 -21.017 O3' -5.612 44.885 -18.054 10 U P -4.323 44.110 -17.541 O3' -1.469 47.055 -14.299 11 A P -0.737 45.896 -13.445 O3' -0.538 45.624 -8.453 12 C P 0.207 44.218 -8.332 O3' -1.498 40.289 -5.574 13 G P -0.464 39.126 -5.945 O3' -1.631 34.343 -7.025 14 A P -0.059 34.047 -7.253 O3' 0.243 33.141 -12.645 15 G P -0.761 34.303 -13.075 O3' -4.465 31.934 -16.403 16 A P -5.822 32.679 -16.805 O3' -10.520 30.921 -16.632 17 G P -11.184 32.267 -17.201 O3' -13.784 35.932 -13.687 18 G P -14.323 37.320 -14.290 O3' -13.633 41.754 -11.699 19 A P -14.241 42.964 -12.546 O3' -14.336 46.765 -8.884 20 C P -14.414 48.352 -8.670 O3' -14.523 49.856 -3.597 21 C P -15.296 51.245 -3.845 O3' -13.165 55.632 -1.883 22 G P -14.167 56.775 -2.395 O3' -12.914 60.815 -5.232 23 G P -14.350 61.405 -5.677 O3' -14.755 63.633 -10.457 24 A P -16.238 64.213 -10.454 O3' -18.915 64.685 -14.812 25 G P -20.449 65.056 -14.493 O3' -24.514 63.404 -17.480 26 U P -25.829 64.003 -16.780 O3' -30.304 61.260 -16.516 27 G P -31.321 62.044 -15.533 O3' -34.859 59.602 -12.617 2 26 W W c 3 25 + + c 4 24 - - c 5 23 + + c 6 22 + + c 9 10 S H c 10 19 W H t 11 18 H S t 12 17 + + c 13 16 S H t 7 21 ! ! ! 1 2 ! ! ! 8 20 ! ! ! 9 19 ! ! ! 2 26 6 10 19 4 SG1 1 1 SG2 8 9 SG3 14 15 SG4 20 20 SG5 27 27 1 0.000 0.000 2 0.000 23.607 3 0.000 62.951 4 0.000 102.295 5 0.000 141.640 6 0.000 180.984 7 0.000 220.329 8 0.000 259.673 9 0.000 338.362 10 0.000 377.706 11 0.000 417.051 12 0.000 456.395 13 0.000 495.740 14 18.543 550.000 15 75.884 550.000 16 94.427 495.740 17 94.427 456.395 18 94.427 417.051 19 94.427 377.706 20 94.427 299.018 21 94.427 220.329 22 94.427 180.984 23 94.427 141.640 24 94.427 102.295 25 94.427 62.951 26 94.427 23.607 27 94.427 0.000