The University of California Santa Cruz (UCSC) Genome Browser Database is an up 
to date source for genome sequence data integrated with a large collection of 
related annotations. The database is optimized to support fast interactive 
performance with the web-based UCSC Genome Browser, a tool built on top of the 
database for rapid visualization and querying of the data at many levels. The 
annotations for a given genome are displayed in the browser as a series of 
tracks aligned with the genomic sequence. Sequence data and annotations may also 
be viewed in a text-based tabular format or downloaded as tab-delimited flat 
files. The Genome Browser Database, browsing tools and downloadable data files 
can all be found on the UCSC Genome Bioinformatics website 
(http://genome.ucsc.edu), which also contains links to documentation and related 
technical information.