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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 ENCODE data at UCSC (2003 to 2012) and to the Neandertal project. Download or purchase the Genome Browser source code, or the Genome Browser in a Box (GBiB) at our online store.

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 UC Santa Cruz Genomics Institute and 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! If you have ideas, drop a comment in our suggestion box.

Give to the UCSC Genome Browser

  NewsFollow @GenomeBrowser on Twitter Genome Browser Facebook page

To receive announcements of new genome assembly releases, new software features, updates and training seminars by email, subscribe to the genome-announce mailing list. Please see our blog for posts about Genome Browser tools, features, projects and more.

23 January 2015 - Genome Browser YouTube Channel

We are pleased to announce the release of the UCSC Genome Browser YouTube channel. The channel contains short videos showing how to use the Genome Browser and associated tools to solve selected problems. The videos were produced by Robert Kuhn and Pauline Fujita, with assistance from Luvina Guruvadoo, Jonathan Casper, Matt Speir and the rest of the Browser staff.

See also the other materials on our training page.

If you have any comments or questions - including requests for future video topics - please send them to our training group at:


15 January 2015 - Proteomics Data Now Available in Genome Browser

We are pleased to announce the release of proteomics data for the human hg19 assembly. Data from the National Cancer Institute's (NCI) Clinical Proteomic Tumor Analysis Consortium (CPTAC) is now available in the UCSC Genome Browser as a public track hub. This track hub contains peptides that were identified by CPTAC in their deep mass spectrometry based characterization of the proteome content of breast, colorectal and ovarian cancer biospecimens that were initially sequenced by The Cancer Genome Atlas. This effort extends the accessibility of CPTAC data to more researchers and provides an additional level of analysis to assist the cancer biology community.

To access and view this hub, navigate to the Track Hub gateway page and select "CPTAC Hub v1" from the Public Hubs list. Please direct any queries to the Fenyo Lab at info@fenyolab.org.

In addition, we have also released a PeptideAtlas track which displays peptide identifications from the PeptideAtlas August 2014 (Build 433) Human build. This build, based on 971 samples containing more than 420 million spectra, identified over a million distinct peptides covering more than 15,000 canonical proteins. To read more about this track, please see the track description page. Many thanks to Eric Deutsch, Zhi Sun, and the PeptideAtlas team at the Institute for Systems Biology, Seattle for providing this data.

19 December 2014 - New Cow (bosTau8) Assembly Now Available in the Genome Browser

We are pleased to announce the release of a Genome Browser for the June 2014 assembly of cow, Bos taurus (Bos_taurus_UMD 3.1.1, UCSC version bosTau8). This updated cow assembly was provided by the UMD Center for Bioinformatics and Computational Biology (CBCB). This assembly is an update to the previous UMD 3.1 (bosTau6) assembly. UMD 3.1 contained 138 unlocalized contigs that were found to be contaminants. These have been suppressed in UMD 3.1.1.

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 cow 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.

12 December 2014 - New D. melanogaster (dm6) Assembly Now Available in the Genome Browser: We are pleased to announce the release of a Genome Browser for the August 2014 assembly of Drosophila melanogaster (BDGP Release 6, UCSC version dm6). Read more.

29 October 2014 - Genome Browser in a Box (GBiB): Sometimes you just want to keep your genomics data to yourself. Have you ever hesitated when uploading your data set into the UCSC Genome Browser? If so, you'll be happy to know that we have created a stand-alone personal version: Genome Browser in a Box (GBiB). 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.