1 19 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 GCCGAUGGUA GUGUGGGGU Crystallography ? ? Angstroms 1 G O3' 17.337 40.501 -20.747 2 C P 16.067 39.683 -21.300 O3' 11.943 42.156 -19.610 3 C P 10.838 41.074 -20.029 O3' 6.364 42.401 -21.914 4 G P 5.709 40.939 -21.989 O3' 3.223 39.362 -26.247 5 A P 2.819 37.841 -25.925 O3' -0.263 37.024 -29.706 6 U P -1.075 35.647 -29.846 O3' -2.828 34.100 -34.451 7 G P -3.235 32.583 -34.123 O3' -1.800 28.652 -37.054 8 G P -2.546 27.528 -36.185 O3' -0.248 22.940 -35.144 9 U P -0.990 22.068 -34.019 O3' 1.539 19.120 -30.623 10 A P 0.443 18.507 -29.625 O3' 1.731 17.075 -24.908 11 G P 0.340 16.359 -24.549 O3' -2.046 17.463 -20.081 12 U P -3.411 16.627 -20.206 O3' -7.725 18.899 -18.273 13 G P -9.077 18.041 -18.396 O3' -13.751 19.495 -17.922 14 U P -14.536 18.087 -17.970 O3' -18.887 17.511 -20.447 15 G P -19.106 15.944 -20.724 O3' -21.615 13.768 -24.619 16 G P -21.382 12.184 -24.492 O3' -21.207 9.132 -28.747 17 G P -20.817 7.619 -28.363 O3' -17.996 4.771 -31.770 18 G P -17.564 3.340 -31.187 O3' -13.332 0.969 -32.528 19 U P -12.845 -0.329 -31.728 O3' -7.881 -3.318 -31.475 SG1 1 1 SG2 19 19 1 0.000 52.105 2 0.000 69.474 3 0.000 98.421 4 0.000 127.368 5 0.000 156.316 6 0.000 185.263 7 0.000 214.211 8 0.000 243.158 9 0.000 272.105 10 0.000 301.053 11 0.000 330.000 12 0.000 358.947 13 0.000 387.895 14 0.000 416.842 15 0.000 445.789 16 0.000 474.737 17 0.000 503.684 18 0.000 532.632 19 0.000 550.000 1 21 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 C CCCAUGCGAG AGUAGGGAAC Crystallography ? ? Angstroms 1 C O3' -2.256 9.536 -25.718 2 C P -2.592 10.748 -26.714 O3' -3.847 10.439 -31.586 3 C P -4.315 11.929 -31.963 O3' -7.805 12.696 -35.609 4 C P -7.997 14.288 -35.642 O3' -12.462 16.352 -36.998 5 A P -12.291 17.928 -36.753 O3' -16.161 20.890 -35.314 6 U P -15.385 22.294 -35.343 O3' -16.222 25.781 -31.603 7 G P -15.072 26.903 -31.616 O3' -13.720 29.502 -27.507 8 C P -12.418 30.436 -27.595 O3' -7.967 31.137 -24.036 9 G P -6.692 31.894 -24.648 O3' -1.922 30.509 -23.554 10 A P -1.127 31.556 -24.474 O3' 3.098 30.770 -21.951 11 G P 4.395 31.638 -22.360 O3' 8.966 29.972 -21.050 12 A P 9.920 31.056 -21.768 O3' 13.553 30.244 -25.218 13 G P 13.713 31.697 -25.883 O3' 14.559 32.408 -30.922 14 U P 14.569 33.977 -31.277 O3' 13.046 35.780 -35.877 15 A P 13.040 37.381 -35.703 O3' 10.314 40.767 -38.468 16 G P 11.066 42.155 -38.166 O3' 8.943 46.386 -35.997 17 G P 10.157 47.280 -35.441 O3' 9.268 50.280 -31.166 18 G P 10.571 51.186 -30.925 O3' 12.439 52.516 -26.423 19 A P 13.571 53.548 -26.925 O3' 18.657 53.519 -25.816 20 A P 19.170 54.654 -26.831 O3' 23.510 54.098 -29.729 21 C P 23.493 55.473 -30.565 O3' 26.059 55.112 -35.100 SG1 18 21 1 69.474 532.632 2 69.474 503.684 3 69.474 474.737 4 69.474 445.789 5 69.474 416.842 6 69.474 387.895 7 69.474 358.947 8 69.474 330.000 9 69.474 301.053 10 69.474 272.105 11 69.474 243.158 12 69.474 214.211 13 69.474 185.263 14 69.474 156.316 15 69.474 127.368 16 69.474 98.421 17 69.474 69.474 18 69.474 52.105 19 69.474 34.737 20 69.474 17.368 21 69.474 0.000 2 17 + + c 3 16 + + c 4 15 S H t 5 14 H W t 8 11 W W t 9 10 W H t 10 9 H S t 11 8 + + c 12 7 W W c 13 6 W W c 14 5 - - c 15 4 + + c 16 3 + + c 17 2 + + c 18 1 + + c 6 13 ! ! ! 7 12 ! ! ! 2 17 17