1 17 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 UCAGACUUUU AAUCUGA LOOP1 8 10 Crystallography ? ? Angstroms 1 U O3' 7.291 -5.948 5.454 2 C P 6.149 -6.216 6.566 O3' 4.972 -2.908 10.490 3 A P 3.674 -3.312 11.365 O3' 0.469 0.009 13.739 4 G P -0.817 -0.681 14.435 O3' -5.395 1.925 14.969 5 A P -6.685 1.104 15.491 O3' -11.633 2.497 14.220 6 C P -12.738 1.450 14.768 O3' -17.060 -0.092 12.221 7 U P -17.985 -1.024 13.169 O3' -21.416 -3.875 9.363 8 U P -22.388 -5.178 9.537 O3' -20.626 -9.112 6.021 9 U P -20.923 -10.206 7.163 O3' -15.733 -12.560 7.954 10 U P -15.395 -14.143 7.774 O3' -9.793 -15.821 7.973 11 A P -8.684 -14.861 7.250 O3' -11.335 -12.617 2.724 12 A P -10.749 -11.625 1.580 O3' -13.952 -7.733 -0.474 13 U P -13.150 -6.453 -1.071 O3' -13.651 -1.326 -0.356 14 C P -12.494 -0.350 -0.926 O3' -11.108 4.342 0.952 15 U P -9.768 4.943 0.272 O3' -6.104 8.013 2.242 16 G P -4.738 8.173 1.393 O3' -0.484 10.162 4.164 17 A P 0.661 10.628 3.139 O3' 5.734 9.504 3.547 1 17 - - c 2 16 + + c 3 15 - - c 4 14 + + c 5 13 - - c 6 12 W W c 7 11 W W c 5 12 ! ! ! 6 11 ! ! ! 10 11 ! ! ! 1 17 7 SG1 8 10 1 0.000 0.000 2 0.000 70.011 3 0.000 140.022 4 0.000 210.033 5 0.000 280.044 6 0.000 350.055 7 0.000 420.066 8 6.649 507.895 9 84.013 550.000 10 161.378 507.895 11 168.027 420.066 12 168.027 350.055 13 168.027 280.044 14 168.027 210.033 15 168.027 140.022 16 168.027 70.011 17 168.027 0.000