Hi

This question is on calculating empty cavities of large protein complexes (~2 MDa) For example, the pdb-id: 6J5K. I have tried a few webservers and they are ignoring to calculate such large protein-pdb files as a whole.

Does ChimeraX have tools that can be installed from the 'More-Tools' or an inbuilt one to calculate protein cavities in ChimeraX? 

If you could suggest external programs for computing cavities, that are reliable for such large protein-inputs, it would be also of a great help. The cavities need not be sealed by proteins all around - they can still be open to the bulk solvent.

Thanks

Yaikhomba