Coordinate system

In VectorBase, the term "coordinate system" or "coord_system" identifies which level of the assembly we are working on. A genome assembly imported into VectorBase has up to three coordinate systems defined in the coord_system table: contigs, scaffolds or chromosomes.

We define one additional coordinate system: toplevel. Toplevel sequences are tagged in the seq_region_attrib table. Most gene annotation is done on toplevel sequence.

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