1 29 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 GGGUGCUCAG UACGAGAGGA ACCGCAcCC 27 CBV LOOP1 15 16 Crystallography ? ? Angstroms 1 G O3' 0.201 57.344 1.382 2 G P -0.101 56.321 0.160 O3' -4.572 55.765 -2.712 3 G P -4.225 54.685 -3.856 O3' -6.650 54.337 -8.270 4 U P -5.825 53.014 -8.681 O3' -5.105 52.671 -13.732 5 G P -4.426 51.220 -13.770 O3' -1.278 50.794 -18.048 6 C P -0.675 49.292 -17.944 O3' 4.803 49.046 -18.676 7 U P 5.478 47.615 -18.459 O3' 10.656 47.600 -17.348 8 C P 11.005 46.040 -17.249 O3' 14.377 45.056 -13.767 9 A P 14.667 43.483 -13.798 O3' 10.934 40.828 -17.433 10 G P 10.805 40.920 -19.038 O3' 11.482 36.297 -16.528 11 U P 12.305 34.946 -16.180 O3' 16.507 35.984 -13.475 12 A P 16.791 34.783 -12.421 O3' 17.375 34.428 -7.503 13 C P 17.468 32.837 -7.668 O3' 14.425 30.248 -4.374 14 G P 14.872 28.741 -4.705 O3' 11.756 24.962 -5.088 15 A P 12.888 23.868 -5.461 O3' 11.929 22.781 -10.621 16 G P 11.295 24.085 -11.285 O3' 6.534 23.453 -14.024 17 A P 6.058 24.884 -14.540 O3' 1.204 26.074 -14.422 18 G P 1.333 27.529 -15.079 O3' 0.834 31.618 -11.176 19 G P 0.821 33.206 -11.410 O3' 3.597 36.516 -9.172 20 A P 3.386 37.885 -9.965 O3' 5.032 41.201 -6.267 21 A P 5.008 42.784 -6.539 O3' 7.555 44.549 -2.339 22 C P 7.379 46.103 -2.653 O3' 11.235 49.382 -1.663 23 C P 10.705 50.675 -2.483 O3' 14.467 53.432 -4.900 24 G P 13.482 54.623 -5.314 O3' 13.580 57.271 -9.877 25 C P 12.624 58.469 -10.325 O3' 9.983 60.345 -14.678 26 A P 9.150 61.572 -14.086 O3' 5.261 63.028 -17.257 27 c P 4.660 64.372 -16.615 O3' -0.564 65.897 -16.496 28 C P -0.730 66.975 -15.342 O3' -4.769 67.119 -12.522 29 C P -4.734 68.192 -11.308 O3' -7.327 68.163 -7.009 1 29 + + c 2 28 + + c 3 27 + + c 4 26 - - c 5 25 + + c 6 24 + + c 9 21 H H t 11 20 W H t 12 19 H S t 13 18 + + c 14 17 S H t 7 23 ! ! ! 8 23 ! ! ! 10 11 ! ! ! 11 21 ! ! ! 10 20 ! ! ! 1 29 7 11 20 4 SG1 8 10 SG2 15 16 SG3 21 22 1 0.000 0.000 2 0.000 33.579 3 0.000 67.159 4 0.000 100.738 5 0.000 134.317 6 0.000 167.897 7 0.000 201.476 8 0.000 235.056 9 0.000 302.214 10 0.000 369.373 11 0.000 402.952 12 0.000 436.532 13 0.000 470.111 14 0.000 503.690 15 15.826 550.000 16 64.765 550.000 17 80.590 503.690 18 80.590 470.111 19 80.590 436.532 20 80.590 402.952 21 80.590 335.794 22 80.590 268.635 23 80.590 201.476 24 80.590 167.897 25 80.590 134.317 26 80.590 100.738 27 80.590 67.159 28 80.590 33.579 29 80.590 0.000