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**Header lines**: The first five lines (four lines for the original ZDOCK file format) provide the names of the input pdb files, as well as parameters for the initial positioning of the structures.

- The first line is the size N of the NxNxN grid used in the
docking, the spacing between grid cells (always 1.2 A),
*and whether the receptor or ligand was fixed during docking (0 = receptor, 1 = ligand).* *The next line gives the initial rotation of the receptor in Euler angles.*- The next line is the initial rotation of the ligand in Euler angles (this is non-zero if the seed is set using "-S seed" in the command line).
- The next line is the receptor file, followed by its initial translation (x, y, z) to center.
- The next line is the ligand file, followed by its initial translation (x, y, z) to center.

- The first line is the size N of the NxNxN grid used in the
docking, the spacing between grid cells (always 1.2 A),
**Prediction lines**: After the header lines, each line describes a rotation and translation for the ligand with respect to its initial positioning.

- The first three columns are the Euler angles (in radians) for rotating the ligand.
- The next three columns are the grid positions describing the translation of the ligand with respect to its starting point.
- The final column is the ZDOCK score (see the references for more on the ZDOCK scoring function).