A Standard Reference Frame for the Description
of Nucleic Acid Base-pair Geometry

Uracil

ATOM      1  C1'   U A   1      -2.481   5.354   0.000

ATOM      2  N1    U A   1      -1.284   4.500   0.000

ATOM      3  C2    U A   1      -1.462   3.131   0.000

ATOM      4  O2    U A   1      -2.563   2.608   0.000

ATOM      5  N3    U A   1      -0.302   2.397   0.000

ATOM      6  C4    U A   1       0.989   2.884   0.000

ATOM      7  O4    U A   1       1.935   2.094  -0.001

ATOM      8  C5    U A   1       1.089   4.311   0.000

ATOM      9  C6    U A   1      -0.024   5.053   0.000

END

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