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Nucleic Acids Res. 2012 Jan;40(Database issue):D115-22. doi: 10.1093/nar/gkr1044.

IMG: the Integrated Microbial Genomes database and comparative analysis system.

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Biological Data Management and Technology Center, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, USA.


The Integrated Microbial Genomes (IMG) system serves as a community resource for comparative analysis of publicly available genomes in a comprehensive integrated context. IMG integrates publicly available draft and complete genomes from all three domains of life with a large number of plasmids and viruses. IMG provides tools and viewers for analyzing and reviewing the annotations of genes and genomes in a comparative context. IMG's data content and analytical capabilities have been continuously extended through regular updates since its first release in March 2005. IMG is available at Companion IMG systems provide support for expert review of genome annotations (IMG/ER:, teaching courses and training in microbial genome analysis (IMG/EDU: and analysis of genomes related to the Human Microbiome Project (IMG/HMP:

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