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UDB database files

A UDB file is a database file that contains sequences and a k-mer  index for those sequences. A UDB file is created using makeudb_usearch, makeudb_ublast or makeudb_utax.

The udb2fasta command can be used to convert the UDB file to FASTA.

See indexing options for a description of index parameters.

Information about a UDB file can be obtained with the udbinfo and udbstats commands.