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 GGCUCGUGUA GCUCAUUAGC UCCGAGCC LOOP1 14 17 Crystallography ? ? Angstroms 1 G P -7.063 -1.668 -22.722 O3' -12.060 0.033 -23.976 2 G P -13.065 1.192 -23.496 O3' -13.467 2.704 -19.062 3 C P -12.443 3.632 -18.239 O3' -13.095 4.952 -13.253 4 U P -14.228 5.083 -12.116 O3' -10.336 5.273 -7.979 5 C P -9.063 5.868 -7.199 O3' -4.836 4.110 -5.159 6 G P -3.886 5.400 -5.030 O3' 1.369 5.277 -6.190 7 U P 2.794 5.549 -6.878 O3' 7.770 6.718 -7.804 8 G P 7.633 5.472 -8.818 O3' 9.286 4.643 -14.399 9 U P 10.888 4.700 -14.266 O3' 11.195 9.337 -15.502 10 A P 10.761 8.161 -16.509 O3' 7.990 10.531 -20.713 11 G P 7.365 11.723 -21.592 O3' 4.824 15.726 -23.688 12 C P 4.770 17.175 -24.385 O3' 2.137 22.139 -23.033 13 U P 1.975 23.564 -22.308 O3' 1.209 26.862 -19.966 14 C P 2.763 27.161 -20.255 O3' 7.105 27.523 -15.706 15 A P 7.344 29.104 -15.532 O3' 2.745 29.469 -12.105 16 U P 1.739 29.779 -10.889 O3' 0.848 24.708 -7.531 17 U P -0.744 24.471 -7.497 O3' -0.229 18.447 -7.251 18 A P -0.947 17.218 -6.504 O3' -6.675 18.891 -7.419 19 G P -8.057 18.128 -7.724 O3' -9.975 16.011 -12.820 20 C P -10.132 14.594 -13.560 O3' -9.900 13.409 -19.272 21 U P -9.526 12.616 -20.625 O3' -7.012 8.263 -21.535 22 C P -6.583 6.715 -21.493 O3' -1.788 4.062 -23.711 23 C P -2.500 2.622 -23.787 O3' -1.672 -2.164 -20.495 24 G P -2.041 -3.273 -19.388 O3' -0.465 -6.616 -15.856 25 A P -1.330 -7.293 -14.681 O3' -2.189 -9.856 -11.564 26 G P -3.582 -10.552 -11.956 O3' -8.147 -11.188 -10.279 27 C P -7.459 -12.573 -10.713 O3' -12.798 -13.414 -12.410 28 C P -13.716 -13.871 -13.650 O3' -9.705 -16.339 -16.733 1 syn 9 syn 14 syn 1 28 + + c 2 27 + + c 3 26 + + c 4 25 - - c 5 24 + + c 6 23 + + c 7 10 W H c 8 22 + + c 10 21 - - c 11 20 + + c 12 19 + + c 13 18 - - c 2 27 5 10 21 4 SG1 1 1 SG2 7 9 SG3 14 17 SG4 22 22 SG5 28 28 1 95.528 0.000 2 95.528 22.608 3 95.528 60.288 4 95.528 97.969 5 95.528 135.649 6 95.528 173.329 7 95.528 211.009 8 95.528 286.370 9 95.528 324.050 10 95.528 361.730 11 95.528 399.410 12 95.528 437.091 13 95.528 474.771 14 100.624 517.688 15 71.921 550.000 16 28.702 550.000 17 0.000 517.688 18 5.096 474.771 19 5.096 437.091 20 5.096 399.410 21 5.096 361.730 22 5.096 248.689 23 5.096 173.329 24 5.096 135.649 25 5.096 97.969 26 5.096 60.288 27 5.096 22.608 28 5.096 0.000