






                                            TABLE








                 Cartesian and cylindrical polar coordinates of atoms in a            

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

              helix.  Successive base-triplets can be generated by adding             

              multiples of 30.0 degrees to phi and the same multiple of               

              0.326 nm to z.                                                          
1




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


            PHOSPHATE   P        0.1814   -0.8757    0.2031    0.8943    -78.30
                        O1       0.1905   -0.9865    0.3008    1.0047    -79.07
                        O2       0.0661   -0.7842    0.2197    0.7870    -85.18
                        O3       0.1823   -0.9346    0.0544    0.9522    -78.96
                        O5       0.3174   -0.7914    0.2047    0.8527    -68.15


            SUGAR       C1       0.5721   -0.5278    0.0740    0.7784    -42.69
                        C2       0.6300   -0.5354    0.2149    0.8268    -40.36
                        C3       0.5569   -0.6572    0.2714    0.8614    -49.72
                        C4       0.5494   -0.7493    0.1498    0.9292    -53.75
                        C5       0.4369   -0.8509    0.1507    0.9565    -62.82
                        O4       0.5296   -0.6583    0.0378    0.8449    -51.18


            THYMINE     N1       0.4551   -0.4363    0.0622    0.6305    -43.79
                        C2       0.4817   -0.3032    0.0408    0.5692    -32.19
                        O2       0.5948   -0.2589    0.0315    0.6487    -23.52
                        N3       0.3707   -0.2216    0.0305    0.4319    -30.87
                        C4       0.2389   -0.2611    0.0394    0.3539    -47.55
                        O4       0.1478   -0.1787    0.0285    0.2319    -50.40
                        C5       0.2211   -0.4027    0.0619    0.4594    -61.23
                        ME       0.0806   -0.4541    0.0729    0.4612    -79.93
                        C6       0.3272   -0.4843    0.0724    0.5845    -55.96


            PHOSPHATE   P        0.2883    0.9182   -0.1705    0.9624     72.57
                        O1       0.1618    0.8531   -0.2112    0.8683     79.26
                        O2       0.3333    1.0307   -0.2555    1.0833     72.08
                        O3       0.2771    0.9669   -0.0185    1.0058     74.01
                        O5       0.4045    0.8088   -0.1601    0.9043     63.43


            SUGAR       C1       0.6079    0.5065   -0.0572    0.7912     39.80
                        C2       0.6804    0.5105   -0.1913    0.8506     36.88
                        C3       0.6351    0.6456   -0.2465    0.9056     45.47
                        C4       0.6307    0.7320   -0.1204    0.9662     49.25
                        C5       0.5376    0.8515   -0.1254    1.0070     57.73
                        O4       0.5845    0.6405   -0.0168    0.8671     47.62


            ADENINE     N1       0.3666    0.0562   -0.0040    0.3709      8.72
                        C2       0.4944    0.0922    0.0071    0.5029     10.56
                        N3       0.5490    0.2109   -0.0081    0.5881     21.01
                        C4       0.4554    0.3029   -0.0393    0.5470     33.63
                        C5       0.3214    0.2825   -0.0543    0.4279     41.32
                        C6       0.2740    0.1517   -0.0356    0.3132     28.97
                        N6       0.1450    0.1173   -0.0473    0.1865     38.98
                        N7       0.2575    0.4015   -0.0864    0.4770     57.33
                        C8       0.3535    0.4887   -0.0897    0.6031     54.12
                        N9       0.4765    0.4363   -0.0622    0.6461     42.48


            PHOSPHATE   P       -0.6757    0.6176   -0.3130    0.9154    137.57
                        O1      -0.7656    0.6788   -0.4134    1.0232    138.44
                        O2      -0.6534    0.4719   -0.3265    0.8060    144.16
                        O3      -0.7287    0.6504   -0.1657    0.9768    138.25
                        O5      -0.5350    0.6937   -0.3137    0.8760    127.64


            SUGAR       C1      -0.1895    0.7881   -0.1757    0.8106    103.52
                        C2      -0.1573    0.8411   -0.3150    0.8557    100.59
                        C3      -0.2949    0.8388   -0.3813    0.8891    109.37
                        C4      -0.3867    0.8792   -0.2659    0.9605    113.74
                        C5      -0.5306    0.8328   -0.2766    0.9875    122.50
                        O4      -0.3258    0.8170   -0.1490    0.8796    111.74


            THYMINE     N1      -0.1701    0.6410   -0.1616    0.6632    104.86
                        C2      -0.0434    0.5973   -0.1313    0.5989     94.16
                        O2       0.0510    0.6730   -0.1159    0.6749     85.67
                        N3      -0.0293    0.4605   -0.1191    0.4614     93.64
                        C4      -0.1289    0.3662   -0.1343    0.3882    109.39
                        O4      -0.1041    0.2461   -0.1209    0.2672    112.92
                        C5      -0.2583    0.4217   -0.1661    0.4945    121.49
                        ME      -0.3724    0.3260   -0.1843    0.4949    138.80
                        C6      -0.2748    0.5544   -0.1785    0.6188    116.37


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