Genome assembly search and request
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Assembly view/request ⓘ
In available browsers
- the assembly exists in the UCSC browser system, the
view
link will lead to the browser
Can be requested
- assembly is not yet in the UCSC browser system, the
request
link will open a request form to ask for the assembly to be added to the UCSC browser system
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Can be requested
Assembly status ⓘ
Latest
- the most recent of all the versions for this assembly chain
Replaced
- this version has been replaced by a newer version of the assembly in the same chain
Suppressed
- this version of the assembly has been suppressed
An assembly chain is the collection of all versions for the same assembly accession.
Latest
Replaced
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Any status
RefSeq category ⓘ
Reference
genome - a manually selected high quality genome assembly that NCBI and the community have identified as being important as a standard against which other data are compared
Representative
genome - a genome computationally or manually selected as a representative from among the best genomes available for a species or clade that does not have a designated reference genome
There are assemblies which have no RefSeq category assignment
For more information, see also:
www.ncbi.nlm.nih.gov/refseq/about/prokaryotes/#referencegenome
Reference
Representative
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Assembly level ⓘ
Complete genome
- all chromosomes are gapless and have no runs of 10 or more ambiguous bases (Ns), there are no unplaced or unlocalized scaffolds, and all the expected chromosomes are present (i.e. the assembly is not noted as having partial genome representation). Plasmids and organelles may or may not be included in the assembly but if present then the sequences are gapless.
Chromosome
- there is sequence for one or more chromosomes. This could be a completely sequenced chromosome without gaps or a chromosome containing scaffolds or contigs with gaps between them. There may also be unplaced or unlocalized scaffolds.
Scaffold
- some sequence contigs have been connected across gaps to create scaffolds, but the scaffolds are all unplaced or unlocalized.
Contig
- nothing is assembled beyond the level of sequence contigs
Complete
Chromosome
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Contig
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