Taxonomy mapping is the process to map genomic contents of KOs (K numbers), modules (M numbers) and other objects to a taxonomy file (see more details in KEGG Syntax). The result is usually viewed with the KEGG taxonomy browser, which is implemented as a special-purpose Brite hierarchy viewer. The fixed-level taxonomy files of 08611 for cellular organisms and 08621 for viruses are used as default. The browser has a zooming capability to adjust the bottom level of the taxonomic tree, for example, family or class in eukaryotes and species or genus in prokaryotes.

Another option of taxonomy mapping is to view the result in a tabular form (used to be called module table) summarizing distributions in taxonomic groups.

The taxonomic distribution of a single KO or module can be viewed from its entry page (such as K22014) through Taxonomy or Virus taxonomy button. Taxonomy mapping is performed using the default taxonomy file of 08611 or 08621.

For a given set of K and/or M numbers this interface returns a summary view of organisms that contain KO groups and/or complete modules. The list of organisms may be collapsed into broader organism groups.

Enter K/M numbers      (Example) M00595 K16952 M00596

This interface displays taxonomic distributions of KOs (K numbers) and modules (M numbers) as genomic features, optionally combined with user-defined data such as for phenotypic features using the Join operation of KEGG Mapper.

This interface uses VOGs (virus ortholog groups) in addition to KOs for the virus taxonomy file.