1 9 1 2 3 4 5 6 7 8 9 GGCAAGCCU Crystallography ? ? Angstroms 1 G O3' 7.178 -5.892 1.208 2 G P 6.431 -7.214 1.727 O3' 3.614 -6.362 6.206 3 C P 2.707 -7.590 6.732 O3' -1.902 -6.720 9.475 4 A P -2.721 -8.059 9.859 O3' -7.753 -9.074 8.921 5 A P -8.540 -10.483 8.883 O3' -13.974 -10.305 8.637 6 G P -14.640 -11.767 8.820 O3' -17.382 -14.582 5.191 7 C P -17.584 -16.133 5.586 O3' -17.115 -20.222 2.412 8 C P -17.061 -21.625 3.210 O3' -14.404 -25.915 1.354 9 U P -14.390 -27.132 2.415 O3' -10.307 -29.864 4.171 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 Crystallography ? ? Angstroms 1 G O3' 0.030 -23.718 3.152 2 G P 0.414 -22.245 2.639 O3' -2.184 -20.939 -1.871 3 C P -1.999 -19.426 -2.405 O3' -5.940 -16.890 -5.148 4 A P -5.617 -15.354 -5.530 O3' -8.586 -11.164 -4.587 5 A P -8.193 -9.599 -4.545 O3' -12.268 -6.002 -4.301 6 G P -11.747 -4.483 -4.486 O3' -11.795 -0.555 -0.856 7 C P -10.870 0.708 -1.249 O3' -7.715 3.337 1.940 8 C P -6.704 4.318 1.148 O3' -1.850 5.615 3.046 9 U P -1.010 6.504 1.993 O3' 3.674 5.897 0.136 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 S H t 5 4 H S t 6 3 + + c 7 2 + + c 8 1 + + c 1 8 8