Welcome to the UCSC Genome Browser website. This site contains the reference sequence and working draft assemblies for a large collection of genomes. It also provides portals to the ENCODE and Neandertal projects.

WARNING: This is our preview site. This website is a weekly mirror of our internal development server for public access. Data and tools here are under construction, have not been quality reviewed, and are subject to change at any time. We provide this site for early access, with the warning that it is less available and stable than our public site. For high-quality reviewed annotations on our production server, visit http://genome.ucsc.edu.

We encourage you to explore these sequences with our tools. The Genome Browser zooms and scrolls over chromosomes, showing the work of annotators worldwide. The Gene Sorter shows expression, homology and other information on groups of genes that can be related in many ways. Blat quickly maps your sequence to the genome. The Table Browser provides convenient access to the underlying database. VisiGene lets you browse through a large collection of in situ mouse and frog images to examine expression patterns. Genome Graphs allows you to upload and display genome-wide data sets.

The UCSC Genome Browser is developed and maintained by the Genome Bioinformatics Group, a cross-departmental team within the Center for Biomolecular Science and Engineering (CBSE) at the University of California Santa Cruz (UCSC). If you have feedback or questions concerning the tools or data on this website, feel free to contact us on our public mailing list.

To receive announcements of new genome assembly releases, new software features, updates and training seminars by email, subscribe to the genome-announce mailing list.

09 April 2013 - The UCSC Cancer Genomics Browser Has a New Look!

The UCSC Cancer Genomics group has recently remodeled the interface of the Cancer Genomics Browser to make it easier to navigate and more intuitive to display, investigate, and analyze cancer genomics data and associated clinical information. This tool provides access to many types of information—biological pathways, collections of genes, genomic and clinical information—that can be used to sort, aggregate, and perform statistical tests on a group of samples. The Cancer Browser currently displays 473 datasets of 25 cancers from The Cancer Genome Atlas (TCGA) as well as data from the Cancer Cell Line Encyclopedia (CCLE) and Stand Up To Cancer.

You can find more information about how to use this tool in the online tutorial, user's guide and FAQ. Any questions or comments should be directed to genome-cancer@soe.ucsc.edu.

05 March 2013 - dbSNP 137 Available for mm10: We are pleased to announce the release of three tracks derived from dbSNP build 137, available on the mouse assembly (GRCm38/mm10). dbSNP build 137 is available at NCBI. The new tracks contain additional annotation data not included in previous dbSNP tracks, with corresponding coloring and filtering options in the Genome Browser. Read more.

11 February 2013 - Denisova tracks released on hg19 browser: In conjunction with the publication of the paper by Meyer et al. A High-Coverage Genome Sequence from an Archaic Denisovan Individual, the UCSC Genome Browser is hosting a set of new tracks. Read more.

The sequence and annotation data displayed in the Genome Browser are freely available for any use with the following conditions:

• Genome sequence data use restrictions are noted within the species sections on the Credits page.
• Some annotation tracks contributed by external collaborators contain proprietary data that have specific use restrictions. To check for restrictions associated with a particular genome assembly, review the database/README.txt file in the assembly's downloads directory.

The UCSC, Ensembl, and NCBI browser and annotation groups have established a common set of minimum requirements for public display of genome data made available after Spring 2009, described here.

The Genome Browser and Blat software are free for academic, nonprofit, and personal use. A license is required for commercial use. See the Licenses page for more information.

Program-driven use of this software is limited to a maximum of one hit every 15 seconds and no more than 5,000 hits per day.

For assistance with questions or problems regarding the UCSC Genome Browser software, database, genome assemblies, or release cycles, see the FAQ.