Xenopus (Silurana) tropicalis Photo courtesy of UNC Chapel Hill, (Chris Showell, all rights reserved.)

The Nov. 2009 Xenopus (Silurana) tropicalis (western clawed frog) draft assembly (GCA_000004195.1) produced by the US DOE Joint Genome Institute (JGI-PGF). See also: WGS record at NCBI.

### Sample position queries

A genome position can be specified by the accession number of a sequenced genomic clone, an mRNA or EST, a chromosomal coordinate range, or keywords from the GenBank description of an mRNA. The following list provides examples of various types of position queries for the frog genome. See the User's Guide for more information.

Request: | Genome Browser Response:
scaffold_3 |  | Displays all of scaffold 3
scaffold_3:1-2000000 |  | Displays first 2 million bases of scaffold_3
scaffold_3:100000+2000 |  | Displays a region of scaffold_3 that spans 2000 bases, starting with position 100000
CR848332 |  | Displays location of mRNA with GenBank accession CR848332
AL680330 |  | Displays location of EST with GenBank accession AL680330
scaffold_1001 |  | Displays location of Genscan gene prediction with identifier scaffold_1001
dazl |  | Lists dazl mRNAs
zinc finger |  | Lists zinc finger mRNAs
asashima |  | Lists mRNAs deposited by scientists named Asashima
Papalopulu,N. |  | Lists mRNAs deposited by co-author N. Papalopulu
Use this last format for author queries. Although GenBank requires the search format Papalopulu N, internally it uses the format Papalopulu,N..

### Assembly Details

Assembly version 4.2--which was constructed from WGS reads using the JGI assembler, Jazz--contains 19,550 scaffolds with an average coverage of 7.65X. Roughly half the genome is contained in 270 scaffolds, each of at least 1.56 Mb in length. For more information about this assembly, see the JGI X. tropicalis website.

Bulk downloads of the sequence and annotation data are available via the Genome Browser FTP server or the Downloads page.

Many thanks to the JGI and the other institutions who contributed to the sequencing and mapping effort for this release. The X. tropicalis (western clawed frog) 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 the success of this release.

downloads page. These data have specific conditions for use.