MODEl <string> :

Where <string> is a valid file name corresponding to the file that contains the atomic coordinates of the search model in the single-model mode. For the multi-model mode, see below. The form of this PDB file was discussed in section 5. Note that when you run the program without the -auto flag, the unit cell dimensions and space group number must be defined in the input file (the CRYST card in the PDB file will be ignored).