1 31 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 GGCCAGAUCU GAGCCUGGGA GCUCUCUGGC C LOOP1 15 20 Crystallography ? ? Angstroms 1 G P -14.314 -17.393 13.833 O3' -14.338 -16.562 8.775 2 G P -14.666 -15.062 8.326 O3' -14.318 -13.870 2.980 3 C P -14.724 -12.348 2.700 O3' -16.901 -10.778 -1.969 4 C P -17.248 -9.217 -2.045 O3' -21.422 -7.433 -5.018 5 A P -21.749 -5.866 -4.953 O3' -26.937 -4.464 -6.114 6 G P -27.297 -2.903 -6.043 O3' -32.414 -1.789 -4.342 7 A P -32.646 -0.229 -4.574 O3' -34.211 3.023 -1.100 8 U P -34.197 4.508 -1.707 O3' -31.440 6.410 3.084 9 C P -32.964 6.417 3.573 O3' -31.415 7.463 8.825 10 U P -29.986 8.047 9.269 O3' -30.869 11.430 5.633 11 G P -31.277 12.376 6.875 O3' -27.812 15.134 10.853 12 A P -26.978 16.497 10.962 O3' -22.394 16.442 13.762 13 G P -21.516 17.782 13.691 O3' -16.256 18.062 14.048 14 C P -15.878 19.617 13.955 O3' -11.658 21.433 11.151 15 C P -11.604 23.006 11.511 O3' -11.809 26.822 7.685 16 U P -12.059 28.359 8.054 O3' -16.016 29.428 3.337 17 G P -15.372 30.150 2.062 O3' -11.260 31.967 -1.140 18 G P -11.476 30.550 -1.853 O3' -15.456 29.065 -5.498 19 G P -17.023 29.289 -5.255 O3' -20.009 24.842 -4.476 20 A P -20.314 23.956 -5.774 O3' -20.783 19.460 -3.994 21 G P -20.331 18.171 -3.160 O3' -15.155 16.900 -3.266 22 C P -15.226 15.343 -2.894 O3' -12.136 12.359 -0.194 23 U P -13.061 11.055 -0.293 O3' -13.263 7.407 3.582 24 C P -14.478 6.444 3.180 O3' -17.896 4.819 7.174 25 U P -19.228 3.988 6.831 O3' -23.915 2.850 9.654 26 C P -24.080 1.336 10.155 O3' -28.147 -1.660 10.824 27 U P -27.627 -3.142 11.141 O3' -31.000 -7.195 9.635 28 G P -30.540 -8.703 9.907 O3' -32.481 -12.293 6.253 29 G P -32.141 -13.839 6.496 O3' -31.700 -16.877 1.955 30 C P -31.394 -18.424 2.231 O3' -28.488 -21.565 -0.357 31 C P -28.383 -22.955 0.430 O3' -24.180 -26.003 -0.287 10 syn 19 syn 1 31 + + c 2 30 + + c 3 29 + + c 4 28 + + c 5 27 - - c 6 26 + + c 7 25 - - c 11 24 + + c 12 23 - - c 13 22 + + c 14 21 + + c 10 11 ! ! ! 15 16 ! ! ! 16 17 ! ! ! 16 18 ! ! ! 20 21 ! ! ! 1 31 7 11 24 4 SG1 8 10 SG2 15 20 1 100.829 0.000 2 100.829 42.012 3 100.829 84.024 4 100.829 126.036 5 100.829 168.048 6 100.829 210.060 7 100.829 252.072 8 100.829 277.279 9 100.829 302.487 10 100.829 327.694 11 159.786 303.688 12 173.452 343.415 13 187.119 383.142 14 200.785 422.870 15 230.185 455.390 16 233.552 499.100 17 209.480 535.739 18 168.024 550.000 19 126.505 535.925 20 102.269 499.394 21 105.440 455.669 22 91.774 415.942 23 78.107 376.215 24 64.441 336.488 25 0.000 252.072 26 0.000 210.060 27 0.000 168.048 28 0.000 126.036 29 0.000 84.024 30 0.000 42.012 31 0.000 0.000