The page that you have requested is part of a service that is no longer directly maintained.
Database on Demand was powered by the free and open source Java tool kit dbtoolkit. More information can be found here: http://code.google.com/p/dbtoolkit.
Protein databases for the service were obtained from the UniProt resource and are accessible from their download pages: http://www.uniprot.org/downloads.
Please contact EBI PRIDE for more advice.