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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.


18 April 2014 - New Motif Displays for Transcription Factor ChIP-seq Track and New Genome Segmentations from ENCODE

The browser's default displayed Transcription Factor ChIP-seq track is updating to the latest data release, which has been enhanced with the display of Factorbook motifs. Within a cluster, a green highlight indicates the highest scoring site of a Factorbook-identified canonical motif for the corresponding factor. Upon clicking a transcription factor's cluster with a motif, the details page now displays the motif's sequence logo, alignment and underlying Positional Weight Matrix. Also, the track configuration page now enables the filtering of factors.

The newly added Genome Segmentations from ENCODE tracks display multivariate genome-segmentation performed on six human cell types (GM12878, K562, H1-hESC, HeLa-S3, HepG2, and HUVEC), integrating ChIP-seq data for eight chromatin marks, RNA Polymerase II, the CTCF transcription factor and input data. In total, twenty-five states were used to segment the genome, and these states were then grouped and colored to highlight predicted functional elements. These Genome Segmentations are the same data as found in the Analysis Working Group Hub, but are now hosted natively in the browser with enhanced filtering capability where desired segmented states can be selected using the 'Filter by Segment Type' control on the track configuration page.


15 April 2014 - New Minke Whale (balAcu1) Assembly Now Available in the Genome Browser

A Genome Browser is now available for the minke whale (Balaenoptera acutorostrata scammoni) assembly released October 2013 by the Korea Ocean Research & Development Institute (KORDI version BalAcu1.0, UCSC version balAcu1). For more information and statistics about this assembly, see the NCBI assembly record for BalAcu1.0. There are 10,776 scaffolds with a total size of 2,431,687,698 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.


11 April 2014 - New UCSC Genes Track Released for GRCm38/mm10

We're happy to announce the release of an updated UCSC Genes track for the GRCm38/mm10 mouse Genome Browser. Read more.

06 March 2014 - The new GRCh38 Human Genome Browser is here! In the final days of 2013, the Genome Reference Consortium (GRC) released the eagerly awaited GRCh38 human genome assembly, the first major revision of the human genome in more than four years. 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.