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Aims to provide access to all available assembled genomes and transcriptomes. In September 2014, diArk contains about 2600 eukaryotes with 6000 genome and transcriptome assemblies, of which 22% are not available via NCBI/ENA/DDBJ. Several indicators for the quality of the assemblies are provided to facilitate their comparison for selecting the most appropriate dataset for further studies. diArk has a user-friendly web interface with extensive options for filtering and browsing the sequenced eukaryotes.


Provides a unique, unambiguous and stable identifier for the set of sequences that comprise a specific version of a genome assembly. The Assembly database stores the names and identifiers for the sequences in each genome assembly and records the organization of the component sequences into scaffolds and chromosomes. This enables the Assembly database to report the assembly structure and to provide mappings between names, synonyms and identifiers for assemblies, chromosomes or scaffolds. In addition, the database calculates numerous statistics from the sequences in each assembly so that users can evaluate different assemblies by comparing their statistics and it also tracks assembly updates so that users can see the history of previous versions for an assembly. The Assembly database also records a variety of metadata about genome assemblies such as names, dates, the degree of assembly, the group that generated the assembly and details about the sequenced organism and sample.