1 19 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 gGCGACUGGU GAGUACGCC 1 CG1 LOOP1 8 11 Crystallography ? ? Angstroms 1 g P -40.235 -7.659 9.611 O3' -42.345 -9.116 4.998 2 G P -42.179 -7.804 4.098 O3' -46.905 -6.052 1.717 3 C P -46.599 -4.601 1.117 O3' -51.733 -2.191 1.470 4 G P -51.602 -0.729 0.836 O3' -54.657 2.269 2.815 5 A P -54.743 3.827 3.166 O3' -55.330 7.451 5.730 6 C P -54.651 8.573 4.813 O3' -52.930 11.720 8.893 7 U P -53.021 13.104 8.097 O3' -48.986 15.709 10.300 8 G P -48.370 16.833 9.342 O3' -42.788 16.945 10.390 9 G P -42.597 18.534 10.411 O3' -43.606 15.636 13.339 10 U P -42.083 15.442 12.894 O3' -40.647 10.830 11.424 11 G P -39.313 10.928 10.545 O3' -36.047 6.629 12.017 12 A P -35.689 5.126 11.604 O3' -36.979 3.835 8.836 13 G P -36.962 2.538 7.898 O3' -41.166 -0.042 10.669 14 U P -40.869 -1.602 10.473 O3' -44.651 -2.706 14.469 15 A P -43.795 -3.564 15.515 O3' -48.164 -3.015 19.633 16 C P -49.342 -4.051 19.318 O3' -54.163 -1.995 18.553 17 G P -55.027 -3.271 18.978 O3' -58.083 -5.811 15.623 18 C P -58.249 -7.316 16.136 O3' -58.247 -11.108 12.410 19 C P -58.094 -12.424 13.307 O3' -55.873 -16.428 10.505 1 19 + + c 2 18 + + c 3 17 + + c 4 16 + + c 5 14 W W t 5 15 W W c 6 13 + + c 7 12 - - c 14 15 S H c 14 16 S H t 4 14 ! ! ! 7 10 ! ! ! 9 10 ! ! ! 11 12 ! ! ! 1 19 5 6 13 2 SG1 8 11 SG2 14 14 1 154.991 0.000 2 154.991 61.135 3 154.991 122.270 4 154.991 183.404 5 154.991 244.539 6 154.991 366.809 7 154.991 427.943 8 163.258 497.575 9 116.690 550.000 10 46.569 550.000 11 0.000 497.575 12 8.267 427.943 13 8.267 366.809 14 8.267 305.674 15 8.267 244.539 16 8.267 183.404 17 8.267 122.270 18 8.267 61.135 19 8.267 0.000