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  About the UCSC Genome Bioinformatics Site

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.

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.


  NewsFollow GenomeBrowser on Twitter

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

27 November 2012 - New UCSC Genes Track Released for Mouse

We're happy to announce the release of a new UCSC Genes track for the GRCm38/mm10 mouse Genome Browser.

The new release has 59,121 transcripts, compared with 55,419 in the previous version on mm9. The total number of canonical genes has increased from 28,661 to 31,227. Comparing the new gene set with the previous version:

  • 48,739 transcripts did not change between versions.
  • 423 transcripts were not carried forward to the new version.
  • 5,108 transcripts are "compatible" with those in the previous set, meaning that the two transcripts show consistent splicing.
  • 1,037 transcripts overlap with those in the previous set.

More details about the new UCSC Genes track can be found on the UCSC Genes track description page. Also, please note that GRCm38/mm10 is now the default mouse assembly on the Genome Browser Gateway.

Many thanks to Brian Raney, Jim Kent, and Luvina Guruvadoo for their work on this track!


14 November 2012 - ENCODE Tutorials Available at Open Helix

OpenHelix and the UCSC Bioinformatics group have worked together to give everyone free access to the newly updated ENCODE tutorial until the end of February 2013.

The online tutorial suite teaches users how to access the ENCODE data in the UCSC Genome Browser. The online tutorial, created by OpenHelix in conjunction with the UCSC Bioinformatics Group can be viewed for free at http://www.openhelix.com/ENCODE2. The tutorial has been updated to reflect the recent changes to the UCSC Genome Browser. The original tutorial is still available at http://www.openhelix.com/ENCODE.

The online narrated tutorial, which runs in just about any browser, can be viewed from beginning to end or navigated using chapters and forward and backward sliders. The approximately 60-minute tutorial explores ways to access the ENCODE data available within the UCSC Genome Browser.

In addition to the tutorial, users can also access useful training materials including the animated PowerPoint slides used as a basis for the tutorial, suggested script for the slides, slide handouts, and exercises.

==> News Archives

  Conditions of Use

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.