1 15 0 1 2 3 4 5 6 7 8 9 11 12 13 14 15 UAAUCUUUGA AGAUU LOOP1 8 9 Crystallography ? ? Angstroms 1 U O3' -14.149 13.518 -24.760 2 A P -13.597 15.029 -24.857 O3' -16.270 16.671 -20.813 3 A P -16.061 15.421 -19.824 O3' -19.973 13.723 -16.969 4 U P -19.536 12.386 -16.213 O3' -22.846 8.637 -15.160 5 C P -21.992 7.401 -14.634 O3' -23.746 2.537 -15.528 6 U P -22.762 1.357 -15.093 O3' -22.315 -3.209 -16.785 7 U P -21.271 -3.735 -15.691 O3' -17.920 -7.711 -18.730 8 U P -16.979 -8.886 -18.216 O3' -12.106 -7.463 -21.366 9 G P -10.726 -6.980 -20.706 O3' -8.971 -1.479 -21.205 10 A P -7.580 -1.236 -21.953 O3' -7.362 -1.412 -27.378 11 A P -11.502 2.807 -28.890 O3' -15.270 -0.332 -30.638 12 G P -16.376 0.710 -31.178 O3' -21.473 0.142 -30.369 13 A P -22.225 1.432 -30.900 O3' -26.659 2.843 -28.759 14 U P -27.098 4.146 -29.574 O3' -29.945 7.746 -26.900 15 U P -30.275 8.864 -27.979 O3' -30.598 13.852 -26.409 10 syn 2 15 - - c 3 14 - - c 4 13 - - c 5 12 + + c 6 11 - - c 7 10 - - c 1 3 ! ! ! 1 4 ! ! ! 2 15 6 SG1 1 1 SG2 8 9 1 0.000 0.000 2 0.000 47.284 3 0.000 126.091 4 0.000 204.897 5 0.000 283.704 6 0.000 362.510 7 0.000 441.317 8 37.141 550.000 9 151.995 550.000 10 189.136 441.317 11 189.136 362.510 12 189.136 283.704 13 189.136 204.897 14 189.136 126.091 15 189.136 47.284