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samirelanduk / atomium

Python macromolecular parsing (with .pdb/.cif/.mmtf parsing and production)
https://atomium.bio
MIT License
103 stars 19 forks source link

Expression System should never be '?' #19

Closed samirelanduk closed 5 years ago

samirelanduk commented 5 years ago

For example, in PDB 12CA, .cif files have an expression system of ?. This should be None.