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 ACGUAAGGAC CGGAGUG LOOP1 14 15 Crystallography ? ? Angstroms 1 U O3' 16.299 34.302 0.681 2 G P 15.761 33.369 -0.487 O3' 13.181 35.910 -4.120 3 C P 12.680 34.641 -4.966 O3' 12.965 34.741 -10.136 4 U P 12.456 33.263 -10.524 O3' 14.862 30.906 -14.662 5 C P 14.334 29.400 -14.844 O3' 17.373 25.644 -16.649 6 C P 16.522 24.281 -16.465 O3' 18.779 19.794 -15.717 7 U P 17.582 18.728 -15.613 O3' 18.052 14.757 -12.257 8 A P 16.750 13.838 -12.498 O3' 12.987 16.775 -15.908 9 G P 12.886 16.537 -17.494 O3' 9.058 13.623 -14.945 10 U P 8.414 12.203 -14.608 O3' 11.597 9.138 -11.888 11 A P 10.504 8.223 -11.168 O3' 10.516 7.580 -6.099 12 C P 9.183 6.710 -5.982 O3' 5.421 7.781 -2.726 13 G P 4.276 6.744 -3.167 O3' -0.582 7.731 -3.522 14 U P -0.888 6.198 -3.872 O3' -2.833 6.733 -8.905 15 A P -1.771 7.785 -9.487 O3' -4.948 11.671 -11.892 16 A P -4.204 12.960 -12.438 O3' -6.291 17.657 -11.296 17 G P -5.084 18.416 -12.075 O3' -0.690 20.396 -9.012 18 G P 0.565 21.187 -9.642 O3' 5.264 20.607 -7.697 19 A P 6.321 21.424 -8.576 O3' 10.150 21.679 -5.049 20 C P 11.668 22.073 -4.795 O3' 13.205 22.168 0.182 21 C P 14.597 22.955 -0.039 O3' 18.989 21.027 1.962 22 G P 19.938 22.240 1.476 O3' 24.156 21.142 -1.107 23 G P 24.682 22.649 -1.425 O3' 27.530 23.105 -5.798 24 A P 28.021 24.622 -5.900 O3' 28.337 27.119 -10.426 25 G P 28.884 28.576 -10.001 O3' 27.845 32.608 -13.211 26 U P 28.474 33.918 -12.547 O3' 25.771 38.358 -12.637 27 G P 26.716 39.456 -11.971 O3' 24.940 43.620 -10.608 1 27 W W c 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 ! ! ! 8 20 ! ! ! 9 19 ! ! ! 16 17 ! ! ! 1 27 7 10 19 4 SG1 8 9 SG2 14 15 SG3 20 20 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 0.000 344.249 10 0.000 382.499 11 0.000 420.749 12 0.000 458.999 13 0.000 497.249 14 18.027 550.000 15 73.773 550.000 16 91.800 497.249 17 91.800 458.999 18 91.800 420.749 19 91.800 382.499 20 91.800 305.999 21 91.800 229.500 22 91.800 191.250 23 91.800 153.000 24 91.800 114.750 25 91.800 76.500 26 91.800 38.250 27 91.800 0.000