1 17 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 UCAGACUUUU AAUCUGA LOOP1 7 11 Crystallography ? ? Angstroms 1 U O3' 5.454 -7.341 5.147 2 C P 4.170 -7.626 6.087 O3' 3.144 -4.766 10.349 3 A P 1.793 -5.302 11.058 O3' -1.302 -1.842 13.682 4 G P -2.811 -2.286 14.062 O3' -6.787 1.407 14.178 5 A P -8.290 0.860 14.419 O3' -12.552 3.215 12.267 6 C P -13.940 2.436 12.519 O3' -17.567 0.834 9.416 7 U P -18.476 -0.119 10.345 O3' -20.425 -4.893 9.057 8 U P -21.008 -5.932 10.151 O3' -20.129 -11.000 8.858 9 U P -19.206 -11.131 10.173 O3' -14.103 -13.863 8.712 10 U P -13.529 -13.809 7.205 O3' -9.776 -16.067 4.580 11 A P -9.069 -14.621 4.388 O3' -10.726 -11.619 -0.094 12 A P -9.901 -10.387 -0.741 O3' -12.332 -6.241 -3.133 13 U P -11.418 -4.916 -3.320 O3' -12.278 0.081 -2.362 14 C P -10.976 0.951 -2.778 O3' -10.143 5.688 -0.133 15 U P -8.774 6.477 -0.444 O3' -5.510 8.769 2.711 16 G P -4.085 9.176 2.071 O3' 0.266 9.518 5.116 17 A P 1.663 9.749 4.354 O3' 6.294 7.960 5.300 1 17 - - c 2 16 + + c 3 15 - - c 4 14 + + c 5 13 - - c 6 12 W W c 1 17 6 SG1 7 11 1 21.799 0.000 2 21.799 74.324 3 21.799 148.649 4 21.799 222.973 5 21.799 297.297 6 21.799 371.622 7 0.000 449.044 8 35.971 520.986 9 110.988 550.000 10 186.005 520.986 11 221.976 449.044 12 200.177 371.622 13 200.177 297.297 14 200.177 222.973 15 200.177 148.649 16 200.177 74.324 17 200.177 0.000