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' 27.969 16.607 27.320 2 G P 28.285 15.600 28.531 O3' 25.947 17.252 32.753 3 C P 25.657 15.907 33.569 O3' 21.678 15.241 36.540 4 G P 22.094 13.807 37.176 O3' 18.185 10.712 38.421 5 C P 18.884 9.444 39.116 O3' 16.520 5.006 39.249 6 G P 17.595 4.083 40.011 O3' 17.576 -1.061 39.012 7 G P 18.792 -1.843 39.702 O3' 21.042 -5.865 38.090 8 C P 22.068 -6.165 39.301 O3' 27.619 -6.913 38.949 9 A P 28.831 -6.652 39.974 O3' 26.677 -3.388 43.767 10 C P 26.585 -2.068 42.850 O3' 29.285 2.015 42.804 11 C P 28.791 2.594 41.390 O3' 31.698 5.602 38.535 12 G P 30.709 5.867 37.293 O3' 32.560 6.520 32.553 13 U P 31.329 7.496 32.246 O3' 32.880 5.426 27.552 14 C P 31.398 4.836 27.400 O3' 30.039 0.612 26.813 15 C P 28.719 0.883 25.924 O3' 24.780 -2.052 25.310 16 G P 23.781 -1.069 24.492 O3' 18.753 -1.332 25.191 17 C P 17.962 -0.229 24.329 O3' 13.985 3.259 26.713 18 G P 13.292 4.604 26.156 O3' 10.729 8.303 29.701 19 G P 9.139 8.207 29.863 O3' 7.949 3.367 32.427 20 A P 8.477 2.578 31.131 O3' 13.893 1.409 32.282 21 A P 14.645 0.284 33.130 O3' 12.519 -4.520 33.468 22 C P 13.725 -5.373 34.117 O3' 14.130 -9.890 32.707 23 A P 15.456 -10.462 33.426 O3' 20.317 -12.332 30.765 24 A P 21.636 -12.707 31.617 O3' 26.461 -12.235 29.166 25 A P 27.196 -12.893 30.443 O3' 32.296 -11.142 29.120 26 C P 33.690 -10.907 29.878 O3' 37.137 -7.427 28.291 27 G P 38.242 -7.652 29.440 O3' 41.320 -3.822 30.765 28 G P 42.230 -4.135 32.067 O3' 42.467 -1.165 37.045 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 6 23 ! ! ! 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