- over 3000 completely sequenced organisms in GenBank, including archaea, bacteria, eukaryotes, viruses, viroids, and plasmids. (A separate file, associated with the NCBI Resource Guide, provides information on how to obtain Entrez Genome database statistics.)
- Includes organisms whose genomes are completed, as well as data from some genome sequencing projects that are currently in progress (mouse, rat, etc.).
- Provides graphical overviews of complete genomes/chromosomes, and the ability to explore regions of interest in progressively greater detail