1 37 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 GGACCGAUGG UAGUGUCUUC GGAUGCGAGA GUAGGUC LOOP1 19 20 Crystallography ? ? Angstroms 1 G O3' -2.646 39.894 -4.678 2 G P -3.535 40.510 -5.886 O3' -4.905 39.691 -1.197 3 A P -4.629 38.201 -0.653 O3' -6.091 36.842 4.310 4 C P -5.772 35.274 4.525 O3' -9.249 31.960 6.889 5 C P -8.879 30.398 6.720 O3' -12.849 26.734 5.942 6 G P -12.350 25.250 5.552 O3' -13.888 22.406 1.582 7 A P -13.434 21.070 0.804 O3' -17.896 18.541 -1.130 8 U P -17.632 17.006 -1.556 O3' -19.402 14.902 -6.259 9 G P -19.030 13.411 -6.762 O3' -15.052 11.343 -9.895 10 G P -13.996 10.220 -9.390 O3' -8.667 9.699 -10.271 11 U P -9.034 8.138 -10.410 O3' -4.317 6.821 -8.161 12 A P -4.346 5.670 -7.024 O3' -1.367 5.663 -2.654 13 G P -1.722 4.234 -1.991 O3' -3.762 3.497 2.866 14 U P -3.977 1.937 3.233 O3' -8.558 0.177 5.709 15 G P -8.001 -1.291 6.056 O3' -12.799 -3.444 6.551 16 U P -13.235 -4.897 7.095 O3' -17.695 -7.291 5.802 17 C P -17.673 -8.806 6.360 O3' -19.422 -13.023 3.618 18 U P -19.002 -14.277 4.539 O3' -15.652 -18.140 3.509 19 U P -14.890 -18.801 4.775 O3' -10.789 -22.386 3.552 20 C P -9.356 -22.640 2.825 O3' -5.659 -19.132 0.368 21 G P -4.850 -20.063 -0.682 O3' -6.055 -17.161 -5.795 22 G P -5.990 -15.865 -6.774 O3' -10.359 -13.819 -9.312 23 A P -10.397 -12.266 -9.768 O3' -15.038 -9.523 -9.767 24 U P -14.844 -7.977 -10.194 O3' -17.888 -4.208 -7.582 25 G P -17.396 -2.769 -8.117 O3' -19.063 0.607 -4.362 26 C P -18.968 2.066 -5.036 O3' -18.454 6.143 -1.474 27 G P -17.885 7.547 -2.034 O3' -13.707 10.269 -0.223 28 A P -13.670 11.765 -0.815 O3' -10.683 13.951 2.952 29 G P -10.789 15.544 3.160 O3' -6.481 18.549 4.531 30 A P -6.699 20.109 4.166 O3' -4.009 23.088 0.539 31 G P -4.806 24.399 0.022 O3' -5.032 25.895 -5.252 32 U P -6.137 26.998 -5.694 O3' -8.816 26.859 -10.329 33 A P -9.618 28.237 -10.543 O3' -14.662 29.165 -11.051 34 G P -15.166 30.611 -10.494 O3' -19.581 31.255 -7.156 35 G P -19.892 32.660 -6.422 O3' -22.253 32.904 -1.637 36 U P -22.632 34.447 -1.365 O3' -21.654 36.676 3.356 37 C P -21.904 38.267 3.287 O3' -19.260 42.124 5.186 2 37 + + c 3 36 - - c 4 35 + + c 5 34 + + c 6 33 S H t 7 32 H W t 8 31 H W t 10 29 W H t 11 28 W H t 12 27 H S t 13 26 + + c 14 25 W W c 14 26 W W c 15 24 W W c 16 23 - - c 17 22 + + c 18 21 S W t 9 30 ! ! ! 2 37 17 SG1 1 1 SG2 19 20 1 0.000 0.000 2 0.000 18.355 3 0.000 48.946 4 0.000 79.537 5 0.000 110.128 6 0.000 140.719 7 0.000 171.310 8 0.000 201.901 9 0.000 232.492 10 0.000 263.083 11 0.000 293.674 12 0.000 324.265 13 0.000 354.856 14 0.000 385.447 15 0.000 416.038 16 0.000 446.629 17 0.000 477.221 18 0.000 507.812 19 14.417 550.000 20 59.001 550.000 21 73.419 507.812 22 73.419 477.221 23 73.419 446.629 24 73.419 416.038 25 73.419 385.447 26 73.419 354.856 27 73.419 324.265 28 73.419 293.674 29 73.419 263.083 30 73.419 232.492 31 73.419 201.901 32 73.419 171.310 33 73.419 140.719 34 73.419 110.128 35 73.419 79.537 36 73.419 48.946 37 73.419 18.355