Check your crystal contents on-line!
Please follow the Upload a new dataset link to predict nucleic acid content of your crystal.
The server requires a file in MTZ format (used in CCP4) or uncompressed CIF format (files used by the PDB to store experimental data) with diffraction data to at least 3.0 Å resolution.
Would you like to see how it works? You can try the server out on few experimental datasets. These were collected for crystals containing either only protein, only DNA, only RNA or a protein-DNA complex. Choose a dataset and click "Run example".