1 18 401 402 403 404 405 406 407 408 409 401 402 403 404 405 406 407 408 409 CGUGACUCUC GUGACUCU LOOP1 8 9 Crystallography ? ? Angstroms 1 C O3' -6.384 82.034 3.198 2 G P -5.236 81.392 2.258 O3' -5.962 78.120 -1.594 3 U P -4.478 77.996 -2.182 O3' -3.828 77.227 -7.362 4 G P -2.260 76.864 -7.393 O3' 0.492 78.554 -11.537 5 A P 2.052 78.619 -11.224 O3' 5.220 81.679 -13.167 6 C P 6.674 81.475 -12.512 O3' 10.617 84.425 -13.095 7 U P 11.730 83.443 -12.506 O3' 15.776 85.113 -9.994 8 C P 16.494 83.890 -9.234 O3' 14.901 78.968 -8.009 9 U P 16.228 78.135 -7.695 O3' 17.016 73.106 -9.236 10 C O3' 6.384 90.823 3.198 11 G P 5.236 91.465 2.258 O3' 5.962 94.737 -1.594 12 U P 4.478 94.861 -2.182 O3' 3.828 95.630 -7.362 13 G P 2.260 95.993 -7.393 O3' -0.492 94.303 -11.537 14 A P -2.052 94.238 -11.224 O3' -5.220 91.178 -13.167 15 C P -6.674 91.382 -12.512 O3' -10.617 88.432 -13.095 16 U P -11.730 89.414 -12.506 O3' -15.776 87.744 -9.994 17 C P -16.494 88.967 -9.234 O3' -14.901 93.889 -8.009 18 U P -16.228 94.722 -7.695 O3' -17.016 99.751 -9.236 2 15 + + c 3 14 - - c 4 13 W W c 5 12 - - c 6 11 + + c 1 16 ! ! ! 7 10 ! ! ! 7 8 ! ! ! 16 17 ! ! ! 1 16 7 SG1 8 9 SG2 17 18 1 0.000 76.931 2 0.000 141.040 3 0.000 205.149 4 0.000 269.259 5 0.000 333.368 6 0.000 397.477 7 0.000 461.586 8 30.214 550.000 9 123.648 550.000 10 153.862 461.586 11 153.862 397.477 12 153.862 333.368 13 153.862 269.259 14 153.862 205.149 15 153.862 141.040 16 153.862 76.931 17 153.862 38.466 18 153.862 0.000