






                                            TABLE








                 Cartesian and cylindrical polar coordinates of atoms in a            

              dinucleotide in the completely unwound L-form of poly d(GC).            

              poly d(GC) duplex stabilized by an intercalator.  The coordinates       

              of the diadically related dinucleotide in the antiparallel chain        

              are given by r, -phi, -z.  Successive dinucleotides can be              

              generated by adding multiples of 1.02 nm to z.                          
1




            --------------------------------------------------------------------
             Group      Atom      x(nm)     y(nm)     z(nm)     r(nm)   phi(deg)
            --------------------------------------------------------------------


            PHOSPHATE   P        0.7165   -0.4691    0.4989    0.8564    -33.21
                        O1       0.7794   -0.3985    0.3850    0.8754    -27.08
                        O2       0.8073   -0.5086    0.6089    0.9542    -32.21
                        O3       0.5967   -0.3806    0.5574    0.7078    -32.53
                        O5       0.6377   -0.5977    0.4456    0.8740    -43.14


            SUGAR       C1       0.2459   -0.7437    0.3602    0.7833    -71.71
                        C2       0.2773   -0.7950    0.2201    0.8419    -70.77
                        C3       0.3940   -0.7084    0.1729    0.8106    -60.92
                        C4       0.4703   -0.7022    0.3052    0.8451    -56.19
                        C5       0.5735   -0.5918    0.3168    0.8241    -45.90
                        O4       0.3661   -0.6835    0.4054    0.7754    -61.82
                        H1       0.2211   -0.8278    0.4250    0.8568    -75.05
                        H12      0.1910   -0.7779    0.1557    0.8010    -76.20
                        H22      0.3094   -0.8989    0.2265    0.9507    -71.01
                        H3       0.3612   -0.6083    0.1451    0.7075    -59.30
                        H4       0.5178   -0.7984    0.3244    0.9516    -57.04
                        H15      0.5247   -0.4950    0.3050    0.7213    -43.33
                        H25      0.6482   -0.6035    0.2385    0.8856    -42.95


            GUANINE     N1       0.1314   -0.2477    0.3402    0.2803    -62.06
                        C2       0.2541   -0.3105    0.3330    0.4012    -50.70
                        N2       0.3601   -0.2306    0.3186    0.4276    -32.63
                        N3       0.2692   -0.4426    0.3397    0.5180    -58.69
                        C4       0.1505   -0.5072    0.3544    0.5290    -73.47
                        C5       0.0242   -0.4534    0.3625    0.4540    -86.94
                        C6       0.0080   -0.3126    0.3553    0.3127    -88.53
                        O6      -0.0954   -0.2467    0.3606    0.2645   -111.15
                        N7      -0.0711   -0.5541    0.3772    0.5586    -97.31
                        C8      -0.0002   -0.6643    0.3775    0.6643    -90.02
                        N9       0.1354   -0.6438    0.3641    0.6579    -78.12
                        H1       0.1303   -0.1479    0.3342    0.1971    -48.60
                        H12      0.4519   -0.2698    0.3128    0.5263    -30.84
                        H22      0.3477   -0.1315    0.3137    0.3717    -20.71
                        H8      -0.0409   -0.7552    0.3867    0.7563    -93.10


            PHOSPHATE   P        0.4039   -0.7987   -0.0712    0.8950    -63.18
                        O1       0.2654   -0.7466   -0.0725    0.7924    -70.43
                        O2       0.4192   -0.9433   -0.0988    1.0323    -66.04
                        O3       0.5967   -0.3806   -0.4626    0.7078    -32.53
                        O5       0.4938   -0.7148   -0.1736    0.8688    -55.37


            SUGAR       C1       0.3572   -0.3205   -0.3609    0.4799    -41.90
                        C2       0.4781   -0.2690   -0.2834    0.5486    -29.37
                        C3       0.5696   -0.3848   -0.3232    0.6874    -34.04
                        C4       0.4799   -0.5050   -0.2938    0.6966    -46.46
                        C5       0.5008   -0.5717   -0.1593    0.7600    -48.78
                        O4       0.3450   -0.4534   -0.3127    0.5697    -52.73
                        H1       0.3785   -0.3172   -0.4678    0.4938    -39.96
                        H12      0.4624   -0.2705   -0.1756    0.5357    -30.33
                        H22      0.5174   -0.1759   -0.3242    0.5465    -18.78
                        H3       0.6632   -0.3950   -0.2682    0.7720    -30.78
                        H4       0.4910   -0.5789   -0.3731    0.7591    -49.70
                        H15      0.4238   -0.5383   -0.0897    0.6851    -51.79
                        H25      0.5985   -0.5439   -0.1197    0.8087    -42.26


            CYTOSINE    N1       0.2338   -0.2465   -0.3333    0.3398    -46.51
                        C2       0.2364   -0.1082   -0.3483    0.2600    -24.59
                        O2       0.3417   -0.0539   -0.3839    0.3459     -8.97
                        N3       0.1230   -0.0378   -0.3232    0.1287    -17.06
                        C4       0.0110   -0.1002   -0.2848    0.1008    -83.74
                        N4      -0.0969   -0.0271   -0.2616    0.1006   -164.37
                        C5       0.0063   -0.2426   -0.2688    0.2426    -88.52
                        C6       0.1206   -0.3110   -0.2944    0.3336    -68.80
                        H14     -0.0934    0.0722   -0.2728    0.1181    142.30
                        H24     -0.1819   -0.0712   -0.2328    0.1954   -158.63
                        H5      -0.0774   -0.2892   -0.2401    0.2994   -104.98
                        H6       0.1217   -0.4105   -0.2844    0.4282    -73.49


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