1 12 1 2 3 4 5 6 7 8 9 10 11 12 GGACuucggt cc 5 DT 6 DT 7 DC 8 DG 9 GFL 10 TAF 11 CFL 12 CFL LOOP1 5 8 Crystallography ? ? Angstroms 1 G O3' 6.720 -8.793 1.793 2 G P 5.752 -9.302 2.973 O3' 6.929 -7.326 7.835 3 A P 5.918 -8.231 8.701 O3' 3.320 -5.499 12.462 4 C P 2.240 -6.603 12.937 O3' -2.210 -3.944 14.879 5 u P -3.178 -5.037 15.558 O3' -8.524 -4.117 14.079 6 u P -9.797 -5.117 14.172 O3' -12.262 -5.332 8.731 7 c P -13.853 -5.565 8.631 O3' -17.837 -7.317 6.260 8 g P -17.724 -6.889 4.707 O3' -13.146 -3.061 3.036 9 g P -12.141 -2.408 1.947 O3' -10.423 1.791 5.216 10 t P -9.517 3.114 4.968 O3' -4.684 5.271 7.424 11 c P -3.744 6.466 6.858 O3' 2.082 6.709 7.971 12 c P 3.285 7.530 7.272 O3' 8.590 5.480 6.919 1 12 + + c 2 11 + + c 3 10 - - c 4 9 + + c 5 9 W W c 6 7 ! ! ! 1 12 4 SG1 5 8 1 14.886 0.000 2 14.886 110.077 3 14.886 220.153 4 14.886 330.230 5 0.000 455.606 6 83.849 550.000 7 210.106 550.000 8 293.956 455.606 9 279.070 330.230 10 279.070 220.153 11 279.070 110.077 12 279.070 0.000