1 9 1 2 3 4 5 6 7 8 9 GGCAaGCCU 5 P5P Crystallography ? ? Angstroms 1 G O3' 12.801 -0.016 -0.144 2 G P 11.530 -0.418 0.776 O3' 10.057 2.454 4.985 3 C P 8.780 1.803 5.730 O3' 4.987 4.022 8.028 4 A P 4.150 2.771 8.613 O3' -1.165 3.021 8.996 5 a O3' -7.239 1.491 7.987 P -2.090 1.695 9.014 6 G P -7.665 -0.058 7.793 O3' -10.956 -1.901 4.251 7 C P -11.124 -3.460 4.639 O3' -11.409 -7.257 1.132 8 C P -11.335 -8.676 1.904 O3' -9.005 -12.950 -0.072 9 U P -8.972 -14.092 1.073 O3' -4.893 -17.057 2.394 SG1 9 9 1 0.000 40.244 2 0.000 107.317 3 0.000 174.390 4 0.000 241.463 5 0.000 308.537 6 0.000 375.610 7 0.000 442.683 8 0.000 509.756 9 0.000 550.000 1 9 1 2 3 4 5 6 7 8 9 G GCAaGCCU 5 P5P Crystallography ? ? Angstroms 1 G O3' 5.760 -10.557 -0.592 2 G P 5.529 -9.253 -1.520 O3' 2.158 -9.112 -5.496 3 C P 2.170 -7.671 -6.221 O3' -1.526 -5.143 -8.320 4 A P -0.921 -3.758 -8.885 O3' -3.783 0.568 -9.577 5 a O3' -4.178 6.676 -7.897 P -2.861 1.883 -9.753 6 G P -2.940 7.704 -7.719 O3' -2.606 11.298 -3.940 7 C P -1.291 12.179 -4.263 O3' 2.038 13.887 -0.780 8 C P 3.330 14.493 -1.536 O3' 8.184 14.287 0.389 9 U P 9.174 14.901 -0.731 O3' 13.656 12.890 -2.355 SG1 9 9 1 160.976 509.756 2 160.976 442.683 3 160.976 375.610 4 160.976 308.537 5 160.976 241.463 6 160.976 174.390 7 160.976 107.317 8 160.976 40.244 9 160.976 0.000 1 8 + + c 2 7 + + c 3 6 + + c 4 5 W W c 6 3 + + c 7 2 + + c 8 1 + + c 5 4 ! ! ! 1 8 8