






                                            TABLE








                 Cartesian and cylindrical polar coordinates of atoms in a            

              base-triplet in the poly (U). poly d(A). poly (U) triple-helix.         

              Successive base-triplets can be generated by adding multiples           

              of 32.7 degrees to phi and the same multiple of 0.304 nm to z.          
1




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


            PHOSPHATE   P        0.1392   -0.8654    0.2200    0.8765    -80.86
                        O1       0.1545   -0.9787    0.3140    0.9908    -81.03
                        O2       0.0259   -0.7740    0.2469    0.7744    -88.08
                        O3       0.1294   -0.9205    0.0701    0.9295    -82.00
                        O5       0.2754   -0.7817    0.2141    0.8288    -70.59


            RIBOSE      C1       0.5232   -0.5308    0.0673    0.7453    -45.41
                        C2       0.5937   -0.5301    0.2018    0.7959    -41.76
                        C3       0.5274   -0.6487    0.2714    0.8360    -50.89
                        C4       0.5079   -0.7468    0.1559    0.9032    -55.78
                        C5       0.3964   -0.8481    0.1732    0.9362    -64.95
                        O4       0.4765   -0.6613    0.0421    0.8151    -54.23
                        O2       0.7302   -0.5572    0.1754    0.9185    -37.35


            URACIL      N1       0.4038   -0.4385    0.0630    0.5961    -47.36
                        C2       0.4292   -0.3040    0.0385    0.5259    -35.31
                        O2       0.5400   -0.2608    0.0207    0.5997    -25.78
                        N3       0.3163   -0.2245    0.0352    0.3879    -35.36
                        C4       0.1855   -0.2644    0.0540    0.3230    -54.94
                        O4       0.0936   -0.1825    0.0487    0.2051    -62.84
                        C5       0.1702   -0.4058    0.0790    0.4400    -67.25
                        C6       0.2771   -0.4868    0.0827    0.5602    -60.35


            PHOSPHATE   P        0.1817    0.9012   -0.1845    0.9193     78.60
                        O1       0.0635    0.8269   -0.2335    0.8293     85.61
                        O2       0.2222    1.0184   -0.2650    1.0424     77.69
                        O3       0.1579    0.9458   -0.0327    0.9589     80.52
                        O5       0.3058    0.8011   -0.1689    0.8575     69.11


            SUGAR       C1       0.5251    0.5180   -0.0524    0.7376     44.61
                        C2       0.6052    0.5237   -0.1820    0.8003     40.87
                        C3       0.5540    0.6535   -0.2442    0.8567     49.71
                        C4       0.5359    0.7428   -0.1214    0.9159     54.19
                        C5       0.4351    0.8550   -0.1356    0.9593     63.03
                        O4       0.4899    0.6511   -0.0178    0.8148     53.04


            ADENINE     N1       0.3117    0.0548    0.0077    0.3165      9.97
                        C2       0.4356    0.1002    0.0260    0.4470     12.96
                        N3       0.4830    0.2216    0.0082    0.5314     24.65
                        C4       0.3860    0.3052   -0.0344    0.4921     38.33
                        C5       0.2551    0.2745   -0.0579    0.3747     47.10
                        C6       0.2155    0.1417   -0.0356    0.2579     33.32
                        N6       0.0903    0.0975   -0.0545    0.1329     47.21
                        N7       0.1859    0.3869   -0.1009    0.4292     64.34
                        C8       0.2756    0.4805   -0.1020    0.5539     60.16
                        N9       0.3995    0.4385   -0.0630    0.5932     47.66


            PHOSPHATE   P       -0.7538    0.4445   -0.3946    0.8751    149.47
                        O1      -0.8478    0.4895   -0.4998    0.9789    150.00
                        O2      -0.7002    0.3075   -0.4102    0.7647    156.29
                        O3      -0.8225    0.4595   -0.2509    0.9421    150.81
                        O5      -0.6328    0.5485   -0.3828    0.8374    139.08


            RIBOSE      C1      -0.3318    0.7201   -0.2277    0.7929    114.74
                        C2      -0.2982    0.7794   -0.3641    0.8345    110.94
                        C3      -0.4243    0.7466   -0.4438    0.8587    119.61
                        C4      -0.5341    0.7653   -0.3390    0.9332    124.91
                        C5      -0.6623    0.6880   -0.3631    0.9550    133.91
                        O4      -0.4732    0.7179   -0.2154    0.8598    123.39
                        O2      -0.2851    0.9193   -0.3462    0.9625    107.23


            URACIL      N1      -0.2817    0.5810   -0.2089    0.6457    115.87
                        C2      -0.1512    0.5664   -0.1688    0.5862    104.95
                        O2      -0.0771    0.6610   -0.1487    0.6655     96.65
                        N3      -0.1084    0.4361   -0.1524    0.4494    103.96
                        C4      -0.1837    0.3221   -0.1723    0.3708    119.69
                        O4      -0.1343    0.2105   -0.1544    0.2497    122.53
                        C5      -0.3194    0.3476   -0.2142    0.4721    132.58
                        C6      -0.3636    0.4734   -0.2309    0.5969    127.53


            --------------------------------------------------------------------
