1 8 1 2 3 4 5 6 7 8 CGCUACGC Crystallography ? ? Angstroms 1 C O3' -329.015 -49.694 -176.886 2 G P -330.206 -49.321 -177.903 O3' -330.960 -50.793 -182.717 3 C P -332.389 -50.094 -182.986 O3' -335.589 -53.242 -185.900 4 U P -336.700 -52.105 -186.165 O3' -341.565 -54.386 -186.550 5 A P -342.389 -53.040 -186.874 O3' -347.471 -53.194 -185.032 6 C P -348.156 -51.736 -185.079 O3' -351.426 -50.405 -181.131 7 G P -351.925 -48.992 -181.713 O3' -352.305 -44.946 -178.383 8 C P -352.540 -43.604 -179.245 O3' -350.621 -38.964 -177.350 1 188.571 0.000 2 188.571 78.571 3 188.571 157.143 4 188.571 235.714 5 188.571 314.286 6 188.571 392.857 7 188.571 471.429 8 188.571 550.000 1 8 9 10 11 12 13 14 15 16 gc gtagcg 1 6HG 2 6HC 3 6HG 4 6HT 5 6HA 6 6HG 7 6HC 8 6HG Crystallography ? ? Angstroms 1 g O3' -335.509 -40.219 -180.450 2 c P -335.239 -41.713 -179.919 O3' -337.161 -42.360 -175.265 3 g P -337.000 -43.923 -174.934 O3' -339.954 -45.865 -171.432 4 t P -339.286 -47.327 -171.442 O3' -342.520 -51.041 -170.246 5 a P -341.542 -52.315 -170.285 O3' -343.305 -56.719 -171.722 6 g P -341.901 -57.502 -171.720 O3' -341.600 -61.530 -174.613 7 c P -340.142 -62.009 -174.120 O3' -337.373 -64.331 -177.640 8 g P -336.100 -64.773 -176.766 O3' -331.577 -64.851 -178.829 1 0.000 550.000 2 0.000 471.429 3 0.000 392.857 4 0.000 314.286 5 0.000 235.714 6 0.000 157.143 7 0.000 78.571 8 0.000 0.000 1 8 + + c 2 7 + + c 3 6 + + c 4 5 - - c 5 4 - - c 6 3 + + c 7 2 + + c 8 1 + + c 1 8 8