UCSC Genome Bioinformatics
Genome Browser
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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 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.

10 February 2016 - Two New Assemblies Now Available in the Genome Browser

A Genome Browser is now available for the mouse lemur (Microcebus murinus) assembly released May 2015 by the The Broad Institute and the Baylor College of Medicine Human Genome Sequencing Center. For more information and statistics about this assembly, see the NCBI assembly record for Mmur_2.0. There are 10,311 scaffolds with a total size of 2,438,804,424 bases.

Bulk downloads of the sequence and annotation data may be obtained from the Genome Browser FTP server or the Downloads page. Please observe the conditions for use when accessing and using these data sets. The annotation tracks for this browser 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.

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A Genome Browser is now available for the platypus (Ornithorhynchus anatinus) assembly released February 2007 by the Genome Sequencing Center at Washington University, St. Louis. For more information about this assembly, see Ornithorhynchus_anatinus-5.0.1 in the NCBI Assembly database. There are 201,525 scaffolds with a total size of 1,996,826,513 bases.

Bulk downloads of the sequence and annotation data may be obtained from the Genome Browser FTP server or the Downloads page. Please observe the conditions for use when accessing and using these data sets. The annotation tracks for this browser 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.


20 Jan 2016 - dbSNP 142 Available for mm10

Data from dbSNP build 142 is now available for the most recent mouse assembly (mm10/GRCm38). As was the case for previous annotations based on dbSNP data, there are three tracks in this release. One is a track containing all mappings of reference SNPs to the mouse assembly, labeled "All SNPs (142)". The other two tracks are subsets of this track and show different interesting and easily defined subsets of dbSNP:

  • Common SNPs (142): uniquely mapped variants that appear in at least 1% of the population
  • Mult. SNPs (142): variants that have been mapped to more than one genomic location

By default, only the Common SNPs (142) are visible. The other tracks can be made visible using the track controls. These three SNPs (142) tracks can be found on the Mouse Dec. 2011 (mm10/GRCm38) browser in the "Variation and Repeats" group.

Thank you to the dbSNP group at NCBI for making these data publicly available. The tracks were produced at UCSC by Brian Raney, Angie Hinrichs and Matthew Speir.


08 January 2016 — dbSNP 144 Available for hg19 and hg38 Read more.

21 December 2015 - Two New Assemblies Now Available in the Genome Browser

Genome Browsers are now available for the frog (Xenopus tropicalis) and cat (Felis catus) assemblies. 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.