1 12 2 3 4 5 6 7 8 9 10 11 12 13 GGUAAUAAGC UC Crystallography ? ? Angstroms 1 G O3' -2.018 -9.827 -1.551 2 G P -3.593 -9.829 -1.905 O3' -7.600 -12.531 -1.085 3 U P -8.674 -11.785 -2.032 O3' -12.832 -9.392 0.713 4 A P -13.865 -8.241 0.257 O3' -14.924 -3.036 2.590 5 A P -15.555 -1.641 2.080 O3' -13.614 3.530 3.932 6 U P -14.617 4.627 4.558 O3' -17.565 7.921 0.054 7 A P -18.234 9.238 0.698 O3' -13.877 13.312 2.303 8 A P -13.268 14.629 1.600 O3' -8.003 15.568 4.269 9 G P -6.406 15.844 4.292 O3' -3.271 15.467 6.609 10 C P -1.967 15.476 5.643 O3' 2.729 14.587 7.583 11 U P 3.868 14.871 6.468 O3' 7.941 12.887 4.607 12 C P 8.314 13.888 3.395 O3' 8.945 12.259 -1.583 SG1 4 8 1 286.394 196.423 2 229.115 166.946 3 171.836 137.469 4 137.469 119.783 5 103.102 102.096 6 68.734 84.410 7 34.367 66.724 8 0.000 49.037 9 209.791 356.744 10 209.791 421.163 11 209.791 485.581 12 209.791 550.000 1 7 18 19 20 21 22 23 24 GAGUACC Crystallography ? ? Angstroms 1 G O3' -4.303 5.458 -5.299 2 A P -3.968 4.287 -4.240 O3' -0.611 0.997 -3.150 3 G P -0.939 0.302 -1.717 O3' 1.303 -0.309 2.540 4 U P 0.130 -1.209 3.184 O3' -2.337 0.100 7.750 5 A P -3.764 -0.500 8.210 O3' -6.345 -0.349 11.451 6 C P -6.005 -1.733 12.215 O3' -8.194 -5.853 13.560 7 C P -7.011 -6.126 14.620 O3' -4.019 -10.465 13.916 1 55.186 550.000 2 55.186 485.581 3 55.186 421.163 4 55.186 356.744 5 242.581 0.000 6 299.860 29.477 7 357.139 58.954 1 7 + + c 2 6 + + c 3 5 W W c 9 4 W W c 10 3 W W c 11 2 - - c 12 1 + + c 1 7 3 9 4 4