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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 a portal to the ENCODE project.

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 view the results of the Genome Browser users' survey we conducted in May 2007, click here.


  News

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 January 2009 - 44-vertebrate Conservation Track Available

We are pleased to announce the release of a new Conservation track based on the human (hg18) assembly. This track shows multiple alignments of 44 vertebrate species and measurements of evolutionary conservation using two methods (phastCons and phyloP) from the PHAST package, for all species (vertebrate) and two subsets (primate and placental mammal). The multiple alignments were generated using multiz and other tools in the UCSC/Penn State Bioinformatics comparative genomics alignment pipeline. Conserved elements identified by phastCons are also displayed in this track.

For more details, visit the track description page

This track is now the default Conservation track for the human assembly; it replaces the previous 28-vertebrate Conservation track. However, the previous 28-Way is still available: it is now named "28-Way Cons".

Many people contributed to the creation of this track including, but not limited to:

  • Adam Siepel (Cornell University): phastCons, phyloP, and other programs in the PHAST package
  • Webb Miller, Bob Harris & Minmei Hou (Penn State Bioinformatics Group): blastz and multiz
  • from the UCSC Genome Browser team: Hiram Clawson, Tim Dreszer, Brian Raney, Kate Rosenbloom & Ann Zweig

  • 3 December 2008 - Updated Horse Genome Browser Available

    The Sep. 2007 EquCab2 release of the horse genome (Equus caballus) is now available in the UCSC Genome Browser. This assembly, UCSC version equCab2, was produced by the Broad Institute. Read more.

    7 November 2008 - Medaka Genome Browser Updated

    We have updated the initial UCSC Medaka Genome Browser (oryLat1) to correct an error with chrUn in which the gap relationships between the contigs within their ultracontigs were incorrect. Read more.

    17 October 2008 - Quality Assurance Engineer Job Opening: The UCSC Genome Browser group has reopened a search for a Quality Assurance engineer: Biological Database Testing and User Support Technician. Applicants should have a strong background in biology and computation, and excellent skills in scientific writing and editing. For details see the job listing.


      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 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.



      Technical Information About the Assembled Sequence