Petromyzon marinus Photo courtesy of (U.S. Environmental Protection Agency)

The Mar. 2007 Petromyzon marinus draft assembly (WUSTL v.3.0 (March 2007)) was produced by the Genome Sequencing Center at Washington University School of Medicine in St. Louis (WUSTL).

### Sample position queries

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

Request: |  | Genome Browser Response:
--- | --- | ---
Contig8854 |  | Displays all of contig Contig8854
Contig0:1-100000 |  | Displays first hundred thousand bases of Contig0
Contig4:100000+2000 |  | Displays a region of Contig4 that spans 2000 bases, starting with position 100000
AF129475 |  | Displays region of mRNA with GenBank accession number AF129475 on Contig1
CO550155 |  | Displays region of EST with GenBank accession CO550155 on Contig2
pseudogene |  | Lists transcribed pseudogenes
homeobox caudal |  | Lists mRNAs for caudal homeobox genes
zinc finger |  | Lists many zinc finger mRNAs
kruppel zinc finger |  | Lists only kruppel-like zinc fingers
zhang |  | Lists mRNAs deposited by scientist named Zhang
Taguchi,T. |  | Lists mRNAs deposited by co-author T. Taguchi
Use this last format for author queries. Although GenBank requires the search format Taguchi T, internally it uses the format Taguchi,T..

### Assembly details

The genome has been sequenced to 5.9X coverage. Please note the description of the assembly in the WUSTL README file.

The UCSC browser displays the 108,241 contigs, containing 831,696,438 bases of sequence, and 195,562,529 bases in gaps (N's in the sequence) between fragments of the contigs. The largest contig, Contig0 is 273,059 bases, and one half of the sequence is contained in 21,088 contigs of size 14,239 (N50) bases are larger.

The mitochondrial genome sequence has been included as chrM. This is sequence from the genbank record NC_001626 accession 5835065.

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 Lamprey 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.