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 GGAAGUUCGG UCUUCGGACC GGCUUCC LOOP1 14 15 Crystallography ? ? Angstroms 1 G O3' 3.644 -11.094 10.722 2 G P 2.296 -10.406 10.171 O3' 3.516 -5.910 6.827 3 A P 2.325 -5.111 6.096 O3' 2.045 -3.680 1.361 4 A P 0.622 -3.212 0.772 O3' -0.805 -4.229 -4.484 5 G P -2.228 -3.818 -5.116 O3' -4.340 -7.457 -8.663 6 U P -5.652 -6.998 -9.476 O3' -10.401 -7.658 -9.355 7 U P -9.810 -7.031 -10.714 O3' -11.856 -3.120 -7.797 8 C P -12.913 -2.595 -8.892 O3' -15.912 -2.469 -6.585 9 G P -15.978 -0.884 -6.306 O3' -18.296 1.395 -2.329 10 G P -18.177 3.001 -2.290 O3' -17.554 5.659 2.696 11 U P -17.427 7.243 2.430 O3' -14.239 10.140 6.180 12 C P -14.378 11.633 5.594 O3' -10.274 14.634 6.761 13 U P -10.570 15.986 5.935 O3' -7.532 17.778 1.607 14 U P -7.573 18.534 0.179 O3' -2.959 18.618 -3.354 15 C P -3.172 18.511 -4.948 O3' -5.459 13.639 -7.750 16 G P -4.454 12.555 -8.390 O3' -1.899 9.361 -5.703 17 G P -2.261 7.801 -5.524 O3' 0.858 6.483 -1.477 18 A P 0.792 5.003 -0.846 O3' -0.567 3.166 3.422 19 C P -0.933 1.601 3.314 O3' -4.678 -0.221 7.219 20 C P -4.445 -1.813 7.147 O3' -9.056 -4.341 9.341 21 G P -8.916 -5.941 9.247 O3' -12.325 -9.035 7.259 22 G P -11.194 -10.156 7.498 O3' -12.452 -14.998 4.853 23 C P -11.136 -15.876 5.159 O3' -9.079 -18.569 0.570 24 U P -7.798 -19.335 1.173 O3' -3.738 -19.298 -2.829 25 U P -2.355 -19.965 -2.342 O3' 1.602 -18.014 -5.985 26 C P 3.133 -18.486 -5.826 O3' 7.377 -16.198 -5.442 27 C P 8.565 -17.231 -5.105 O3' 11.817 -18.419 -0.771 7 syn 16 syn 1 27 W W c 2 26 W W c 3 25 - - c 4 24 - - c 5 23 + + c 6 22 W W c 8 21 + + c 9 20 + + c 10 19 + + c 11 18 W W c 12 17 + + c 13 16 S W t 6 7 ! ! ! 7 8 ! ! ! 1 27 6 8 21 6 SG1 7 7 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 0.000 205.544 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