






                                            TABLE








                 Cartesian and cylindrical polar coordinates of atoms in a            

              base-pair in the poly d(A). poly (U) duplex.  Successive base-          

              pairs can be generated by adding multiples of 32.7 degrees to           

              phi and the same multiple of 0.306 nm to z.                             
1




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


            PHOSPHATE   P        0.2934    1.0190   -0.0903    1.0604     73.94
                        O1       0.3741    1.1424   -0.1027    1.2021     71.87
                        O2       0.1778    1.0075   -0.1821    1.0231     79.99
                        O3       0.2438    1.0023    0.0609    1.0315     76.33
                        O5       0.3880    0.8911   -0.1069    0.9719     66.47


            SUGAR       C1       0.5321    0.5396   -0.1166    0.7578     45.40
                        C2       0.5297    0.6107   -0.2515    0.8084     49.06
                        C3       0.6093    0.7376   -0.2210    0.9567     50.44
                        C4       0.5893    0.7611   -0.0713    0.9626     52.25
                        C5       0.5121    0.8862   -0.0339    1.0235     59.98
                        O4       0.5180    0.6442   -0.0218    0.8266     51.20
                        H1       0.6282    0.4874   -0.1044    0.7951     37.81
                        H12      0.5841    0.5502   -0.3255    0.8024     43.29
                        H22      0.4261    0.6377   -0.2766    0.7669     56.25
                        H3       0.5786    0.8272   -0.2767    1.0095     55.03
                        H4       0.6871    0.7620   -0.0209    1.0260     47.96
                        H15      0.5723    0.9751   -0.0579    1.1306     59.59
                        H25      0.4912    0.8854    0.0741    1.0125     60.98


            ADENINE     N1       0.4068    0.0547   -0.0115    0.4105      7.66
                        C2       0.5243    0.1166   -0.0223    0.5371     12.54
                        N3       0.5495    0.2427   -0.0498    0.6007     23.83
                        C4       0.4349    0.3116   -0.0682    0.5350     35.62
                        C5       0.3079    0.2622   -0.0604    0.4044     40.41
                        C6       0.2940    0.1257   -0.0303    0.3198     23.15
                        N6       0.1755    0.0640   -0.0195    0.1868     20.02
                        N7       0.2152    0.3624   -0.0852    0.4215     59.30
                        C8       0.2879    0.4676   -0.1068    0.5491     58.38
                        N9       0.4222    0.4446   -0.0982    0.6131     46.48
                        H2       0.6047    0.0591   -0.0074    0.6076      5.58
                        H16      0.1717   -0.0336    0.0022    0.1750    -11.07
                        H26      0.0909    0.1154   -0.0332    0.1469     51.78
                        H8       0.2491    0.5574   -0.1279    0.6105     65.92


            PHOSPHATE   P        0.2839   -0.8509    0.2651    0.8970    -71.55
                        O1       0.3151   -0.9495    0.3710    1.0004    -71.64
                        O2       0.1631   -0.7681    0.2870    0.7852    -78.01
                        O3       0.2728   -0.9255    0.1239    0.9649    -73.58
                        O5       0.4104   -0.7561    0.2409    0.8603    -61.51


            RIBOSE      C1       0.6402   -0.4995    0.1024    0.8120    -37.96
                        C2       0.7111   -0.4802    0.2361    0.8580    -34.03
                        C3       0.6514   -0.5951    0.3173    0.8823    -42.41
                        C4       0.6460   -0.7072    0.2136    0.9578    -47.59
                        C5       0.5419   -0.8146    0.2379    0.9784    -56.37
                        O4       0.6141   -0.6384    0.0891    0.8858    -46.11
                        O2       0.8504   -0.4982    0.2182    0.9856    -30.36
                        H1       0.7069   -0.4681    0.0207    0.8478    -33.51
                        H2       0.6808   -0.3843    0.2806    0.7818    -29.44
                        H3       0.5494   -0.5701    0.3500    0.7918    -46.06
                        H4       0.7452   -0.7536    0.2044    1.0598    -45.32
                        H15      0.5470   -0.8895    0.1574    1.0442    -58.41
                        H25      0.5623   -0.8642    0.3340    1.0310    -56.95


            URACIL      N1       0.5110   -0.4262    0.0920    0.6654    -39.83
                        C2       0.5172   -0.2926    0.0607    0.5942    -29.50
                        O2       0.6222   -0.2338    0.0418    0.6647    -20.59
                        N3       0.3954   -0.2279    0.0519    0.4564    -29.96
                        C4       0.2711   -0.2846    0.0714    0.3930    -46.39
                        O4       0.1689   -0.2165    0.0608    0.2746    -52.05
                        C5       0.2748   -0.4252    0.1037    0.5063    -57.13
                        C6       0.3918   -0.4905    0.1129    0.6278    -51.38
                        H3       0.3976   -0.1306    0.0293    0.4185    -18.18
                        H5       0.1893   -0.4747    0.1195    0.5110    -68.26
                        H6       0.3920   -0.5880    0.1354    0.7067    -56.31


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