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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.

The Genome Browser project team relies on public funding to support our work. Donations are welcome -- we have many more ideas than our funding supports! Give to the UCSC Genome Browser

  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.


30 July 2014 - New Rat (rn6) Assembly Now Available in the Genome Browser

We are excited to announce the release of a Genome Browser for the July 2014 assembly of rat, Rattus norvegicus (RGSC Rnor_6.0, UCSC version rn6)! This assembly is provided by the Rat Genome Sequencing Consortium, which is comprised of eight research organizations across the United States and Canada and led by the Baylor College of Medicine. The new RGSC Rnor_6.0 assembly contains a new, partially assembled Y chromosome as well as improvements to other regions of the genome. You can find more information on the RGSC's efforts to sequence rat genome on the Baylor College of Medicine's project page.

Bulk downloads of the sequence and annotation data are available via the Genome Browser FTP server or the Downloads page. These data have specific conditions for use. The rat (rn6) browser annotation tracks were generated by UCSC and collaborators worldwide. See the Credits page for a detailed list of the organizations and individuals who contributed to this release.


15 July 2014 - New Shrew (sorAra2) Assembly Now Available in the Genome Browser

We are pleased to announce the release of a Genome Browser for the August 2008 assembly of shrew, Sorex araneus (Broad SorAra2.0, UCSC version sorAra2). The whole genome shotgun assembly was provided by The Broad Institute. There are 12,845 scaffolds with a total size of 2,423,158,183 bases.

Bulk downloads of the sequence and annotation data are available via the Genome Browser FTP server or the Downloads page. These data have specific conditions for use. The shrew (sorAra2) browser annotation tracks were generated by UCSC and collaborators worldwide. See the Credits page for a detailed list of the organizations and individuals who contributed to this release.


15 July 2014 - New Pika (ochPri3) Assembly Now Available in the Genome Browser: We are pleased to announce the release of a Genome Browser for the May 2012 assembly of pika, Ochotona princeps (Broad OchPri3.0, UCSC version ochPri3). Read more.

19 June 2014 - Conservation Track Released for Rat (rn5): We have released a new Conservation track based on the rat (rn5) assembly. Read more.


  Conditions of Use

The Genome Browser software, sequence and annotation data are freely available for use with these conditions. A license is required for commercial use of the software. For assistance with questions or problems regarding the UCSC Genome Browser software, database, genome assemblies, or release cycles, click here.

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.

The UCSC Genome Browser was created by the Genome Bioinformatics Group of UC Santa Cruz. Software Copyright (c) The Regents of the University of California. All rights reserved.