1 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 gGCGCGGCAC CGUCCGCGGA ACAAACGG 1 GTP Crystallography ? ? Angstroms 1 g O3' 27.646 16.814 27.331 2 G P 28.075 15.937 28.561 O3' 25.646 17.641 32.740 3 C P 25.332 16.322 33.579 O3' 21.362 15.663 36.494 4 G P 21.758 14.284 37.163 O3' 17.865 11.118 38.419 5 C P 18.629 9.939 39.139 O3' 16.211 5.396 39.236 6 G P 17.286 4.527 40.074 O3' 17.331 -0.641 39.170 7 G P 18.561 -1.426 39.867 O3' 20.797 -5.403 38.259 8 C P 21.851 -5.673 39.451 O3' 27.371 -6.548 39.101 9 A P 28.555 -6.273 40.150 O3' 26.456 -3.019 43.952 10 C P 26.296 -1.774 42.993 O3' 28.992 2.406 42.916 11 C P 28.477 3.000 41.496 O3' 31.432 5.884 38.617 12 G P 30.436 6.219 37.427 O3' 32.389 6.756 32.611 13 U P 31.100 7.676 32.356 O3' 32.688 5.670 27.635 14 C P 31.179 4.998 27.528 O3' 29.758 0.884 26.880 15 C P 28.456 1.185 25.997 O3' 24.531 -1.733 25.434 16 G P 23.567 -0.785 24.616 O3' 18.465 -0.981 25.287 17 C P 17.678 0.145 24.492 O3' 13.647 3.537 26.840 18 G P 12.973 4.831 26.236 O3' 10.526 8.511 29.685 19 G P 8.898 8.445 29.807 O3' 7.689 3.653 32.527 20 A P 8.248 2.885 31.228 O3' 13.594 1.692 32.424 21 A P 14.373 0.624 33.290 O3' 12.203 -4.139 33.753 22 C P 13.312 -5.147 34.315 O3' 13.836 -9.852 32.564 23 A P 15.153 -10.445 33.257 O3' 20.090 -12.023 30.950 24 A P 21.382 -12.316 31.835 O3' 26.148 -11.935 29.335 25 A P 26.938 -12.622 30.553 O3' 32.003 -10.868 29.214 26 C P 33.408 -10.632 29.917 O3' 36.932 -7.098 28.398 27 G P 38.028 -7.340 29.542 O3' 41.110 -3.408 30.901 28 G P 42.005 -3.779 32.168 O3' 42.203 -0.814 37.187 3 18 + + c 4 17 + + c 4 20 S S t 5 16 + + c 6 15 + + c 7 14 + + c 7 24 S W t 8 12 W H t 10 28 + + c 11 27 + + c 12 26 + + c 14 25 S W c 15 23 S W c 8 26 ! ! ! 16 22 ! ! ! 1 2 ! ! ! 13 14 ! ! ! 16 21 ! ! ! 3 18 5 10 28 3 SG1 1 2 SG2 8 9 SG3 13 13 SG4 19 25 1 0.000 123.134 2 0.000 147.761 3 0.000 172.388 4 0.000 213.433 5 0.000 254.478 6 0.000 295.522 7 0.000 336.567 8 98.507 550.000 9 98.507 525.373 10 98.507 500.746 11 98.507 459.701 12 98.507 418.657 13 123.134 336.567 14 98.507 336.567 15 98.507 295.522 16 98.507 254.478 17 98.507 213.433 18 98.507 172.388 19 98.507 147.761 20 98.507 123.134 21 98.507 98.507 22 98.507 73.881 23 98.507 49.254 24 98.507 24.627 25 98.507 0.000 26 0.000 418.657 27 0.000 459.701 28 0.000 500.746