1 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 GGUUCACCUC UAACCGGGUG AGCC LOOP1 11 14 Crystallography ? ? Angstroms 1 G P 6.552 -1.110 24.387 O3' 3.285 -0.574 19.131 2 G P 3.464 0.554 18.000 O3' 4.068 -1.123 12.836 3 U P 3.209 -0.150 11.898 O3' 0.315 -2.036 8.153 4 U P -0.735 -0.979 7.571 O3' -4.731 -2.727 5.007 5 C P -5.783 -1.679 4.429 O3' -11.341 -1.838 5.165 6 A P -12.279 -0.551 5.066 O3' -16.953 -0.779 7.160 7 C P -17.796 0.543 7.357 O3' -21.170 2.867 11.145 8 C P -21.664 4.319 10.668 O3' -23.241 7.168 14.977 9 U P -23.943 8.590 14.819 O3' -22.329 13.563 16.591 10 C P -22.454 15.110 16.260 O3' -20.379 20.074 17.056 11 U P -21.469 20.789 16.131 O3' -20.388 23.909 12.496 12 A P -21.632 23.902 11.496 O3' -20.122 21.739 7.081 13 A P -19.357 20.406 7.514 O3' -13.870 19.535 7.371 14 C P -12.734 18.690 8.093 O3' -7.033 19.947 8.982 15 C P -6.600 18.603 9.735 O3' -4.924 19.112 14.685 16 G P -4.832 17.704 15.441 O3' -7.881 15.812 19.777 17 G P -7.757 14.302 20.288 O3' -11.194 12.217 23.445 18 G P -10.897 10.707 23.870 O3' -13.904 5.964 23.707 19 U P -13.149 4.561 23.863 O3' -15.596 0.347 22.199 20 G P -14.756 -1.013 22.280 O3' -15.970 -5.096 19.579 21 A P -14.849 -6.145 20.032 O3' -13.393 -9.649 16.631 22 G P -12.184 -10.659 16.853 O3' -9.064 -12.606 12.460 23 C P -8.038 -13.674 13.052 O3' -3.441 -13.870 11.058 24 C P -2.728 -14.812 12.142 O3' 2.265 -14.087 13.426 1 24 + + c 2 23 + + c 3 22 W W c 4 21 - - c 5 20 + + c 6 19 - - c 7 18 + + c 8 17 + + c 9 16 W W c 10 15 W W c 11 14 ! ! ! 1 24 10 SG1 11 14 1 126.802 0.000 2 126.802 50.016 3 126.802 100.032 4 126.802 150.047 5 126.802 200.063 6 126.802 250.079 7 126.802 300.095 8 126.802 350.111 9 126.802 400.127 10 126.802 450.142 11 133.565 507.110 12 95.467 550.000 13 38.099 550.000 14 0.000 507.110 15 6.764 450.142 16 6.764 400.127 17 6.764 350.111 18 6.764 300.095 19 6.764 250.079 20 6.764 200.063 21 6.764 150.047 22 6.764 100.032 23 6.764 50.016 24 6.764 0.000