1 9 1 2 3 4 5 6 7 8 9 GGCaaGCCU 4 P5P 5 P5P Crystallography ? ? Angstroms 1 G O3' 10.704 -3.386 9.141 2 G P 9.733 -4.301 10.057 O3' 6.764 -2.336 13.930 3 C P 5.903 -3.511 14.634 O3' 0.893 -2.678 16.400 4 a O3' -3.827 -6.781 15.316 P 0.328 -4.075 16.978 5 a O3' -8.271 -10.799 13.989 P -4.177 -8.339 15.547 6 G P -8.098 -12.284 14.609 O3' -9.734 -16.645 12.079 7 C P -9.114 -17.987 12.738 O3' -7.509 -22.155 10.230 8 C P -6.792 -23.235 11.197 O3' -3.069 -26.571 9.365 9 U P -2.425 -27.465 10.550 O3' 2.686 -28.415 11.256 4 5 ! ! ! SG1 4 5 SG2 9 9 1 0.000 146.741 2 44.954 211.494 3 89.908 276.247 4 116.880 315.098 5 143.852 353.950 6 153.530 345.048 7 153.530 423.876 8 153.530 502.703 9 153.530 550.000 1 9 1 2 3 4 5 6 7 8 9 G GCaaGCCU 4 P5P 5 P5P Crystallography ? ? Angstroms 1 G O3' 9.375 -17.566 6.913 2 G P 8.519 -16.401 6.187 O3' 5.105 -17.614 2.266 3 C P 4.318 -16.321 1.688 O3' -0.682 -16.802 -0.028 4 a O3' -4.914 -12.317 1.422 P -2.148 -16.264 -0.455 5 a O3' -8.193 -7.334 2.700 P -4.947 -10.751 1.036 6 G P -7.733 -5.932 2.036 O3' -8.347 -1.288 4.418 7 C P -7.504 -0.087 3.737 O3' -5.304 3.814 6.419 8 C P -4.432 4.770 5.448 O3' -0.082 7.303 7.049 9 U P 0.632 8.027 5.792 O3' 5.717 8.026 4.718 SG1 4 5 SG2 9 9 1 342.716 502.703 2 342.716 423.876 3 342.716 345.048 4 299.259 246.061 5 272.287 207.209 6 245.315 168.358 7 200.361 103.605 8 155.407 38.852 9 128.435 0.000 1 8 + + c 2 7 + + c 3 6 + + c 6 3 + + c 7 2 + + c 8 1 + + c 4 5 ! ! ! 5 4 ! ! ! 1 8 3 6 3 3