[modeller_usage] Biological unit

Hi,

Sorry for the question not related to homology modeling!

I would like to create a PDB file of my protein in 500x500 unit cells (in 2D crystal) based upon the crystal symmetry, and I believe MODELLER has certain functions or commands to build it. Could anyone give me a hint of how to do it?

Thanks a million for the help!

Best, Po-Lin