1 27 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 GGAAGACCGG UCUUCGGACC GGCUUCC LOOP1 14 15 Crystallography ? ? Angstroms 1 G O3' 12.187 -2.199 15.183 2 G P 10.580 -2.250 15.113 O3' 8.856 -0.584 10.026 3 A P 7.261 -0.564 9.806 O3' 6.430 -0.753 4.104 4 A P 4.874 -0.499 3.776 O3' 3.772 -3.885 -0.535 5 G P 2.266 -3.639 -1.048 O3' 0.072 -8.638 -1.813 6 A P -1.439 -8.954 -2.267 O3' -5.558 -10.700 -3.078 7 C P -6.122 -9.255 -3.504 O3' -9.205 -6.839 -0.057 8 C P -9.830 -5.420 0.376 O3' -13.760 -5.017 4.002 9 G P -14.179 -3.490 3.708 O3' -15.797 -1.018 8.397 10 G P -16.238 0.502 8.106 O3' -14.251 4.105 11.859 11 U P -14.609 5.653 11.599 O3' -12.187 9.476 14.734 12 C P -12.853 10.887 14.340 O3' -9.815 15.142 13.372 13 U P -10.955 16.266 13.191 O3' -10.650 18.993 8.124 14 U P -11.641 20.197 8.525 O3' -12.444 21.538 3.008 15 C P -12.716 21.327 1.437 O3' -11.730 15.643 -0.837 16 G P -12.060 14.618 -2.036 O3' -7.619 12.119 -2.045 17 G P -6.255 11.262 -1.934 O3' -1.894 10.192 0.457 18 A P -1.506 8.694 0.901 O3' 1.067 7.606 5.321 19 C P 1.388 6.030 5.377 O3' 0.289 4.114 10.564 20 C P 0.844 2.617 10.769 O3' -1.110 -0.380 14.889 21 G P -0.407 -1.826 14.801 O3' -3.214 -6.052 16.028 22 G P -2.506 -7.460 15.692 O3' -4.676 -11.752 14.513 23 C P -3.287 -12.517 14.800 O3' -1.175 -16.029 10.831 24 U P 0.353 -16.375 11.205 O3' 4.002 -17.323 7.176 25 U P 5.562 -17.355 7.577 O3' 8.869 -16.483 3.125 26 C P 10.429 -16.764 3.403 O3' 14.008 -13.055 1.649 27 C P 15.533 -13.368 2.064 O3' 19.596 -10.110 3.126 16 syn 1 27 + + c 2 26 + + c 3 25 - - c 4 24 - - c 5 6 S H c 5 23 + + c 7 22 + + c 8 21 + + c 9 20 + + c 10 19 + + c 11 18 - - c 12 17 + + c 13 16 S W t 6 23 ! ! ! 13 17 ! ! ! 1 27 5 7 22 7 SG1 6 6 SG2 14 15 1 98.661 0.000 2 98.661 41.109 3 98.661 82.218 4 98.661 123.327 5 98.661 164.435 6 98.661 205.544 7 98.661 246.653 8 98.661 287.762 9 98.661 328.871 10 98.661 369.980 11 98.661 411.089 12 98.661 452.197 13 98.661 493.306 14 79.287 550.000 15 19.374 550.000 16 0.000 493.306 17 0.000 452.197 18 0.000 411.089 19 0.000 369.980 20 0.000 328.871 21 0.000 287.762 22 0.000 246.653 23 0.000 164.435 24 0.000 123.327 25 0.000 82.218 26 0.000 41.109 27 0.000 0.000