The Aspergillus niger nuclear genome sequence, assembly, and annotation displayed in Map Viewer (build 1.1) is based on the A. niger strain CBS 513.88 genome provided by DSM, The Netherlands and their collaborators. DSM sequenced the A. niger genome at approximately 7.5X coverage using a BAC walking approach. They assembled the sequence into 19 scaffolds and annotated the genome assembly using both automatic and manual methods.

The A. niger nuclear genome is approximately 37 Mb, organized in eight chromosomes.

The NCBI Map Viewer provides graphical displays of features on the A. niger genome sequence assembly. Map features that can be seen along the sequence include NCBI contigs, genes, RefSeq transcripts, ESTs, and GenBank genomic sequences. You can find features of interest by submitting a query against the whole genome or against one chromosome at a time. Results are indicated both graphically, as tick marks on the ideogram, and in a tabular format. The results table includes links to a chromosome graphical view, where the feature can be seen in the context of additional data. You can also browse a chromosome by clicking on a chromosome link in the ideogram above. Use the "Maps & Options" window, available on individual chromosome displays, to configure your display. Extensive documentation and tutorials are provided to describe the resource.

The chromosomes in Map Viewer were constructed from data provided by the Joint Genome Institute's Aspergillus niger genome website.

A. niger, a filamentous fungus, is widely used in industry to produce citric acid, pharmaceuticals, enzymes, and food products.

Available Documentation:

• NCBI Handbook: Map Viewer chapter - resource description
• NCBI Handbook: Map Viewer Exercises - tutorials and examples
• Map Viewer Help - details about navigation and customizing your display

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