| Entry | The KO (KEGG ORTHOLOGY) database is a collection of manually defined ortholog groups, called KOs, that correspond to the nodes (boxes) of the KEGG pathway maps or the nodes (bottom leaves) of the BRITE functional hierarchies. Each KO entry is identified by the unique identifier called the K number ('K' followed by five-digit number). Genes in complete genomes are assigned K numbers both computationally and manually. The KO system is the basis for linking genomic information to higher-level systemic functional information through the processes of KEGG mapping. |
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| Symbol | Symbol representation of KO, which is not unique. |
| Name | Name of KO, which may be followed by the EC number for enzymes. |
| Pathway | KEGG pathways that contain this KO entry. By clicking on the link, the corresponding rectangular object is marked red in the pathway map. |
| Module | KEGG modules that contain this KO entry. By clicking on the link, the corresponding rectangular object is marked red in the module diagram. |
| Network | KEGG network variation maps (nt entries) and network elements (N entries) that contain this KO. By clicking on the nt link, the KO name is framed red in the variation diagram. |
| Reaction | KEGG reactions that are related to this enzyme KO. |
| Disease | Known association to human diseases as stored in the KEGG DISEASE database. |
| Brite | This represents the hierarchical classification of the KO system that follows the hierarchy of the KEGG pathways, as well as other classifications in the BRITE database. |
| Other DBs | Links to KEGG REACTION, and also to COG, GO, and other classification systems. |
| Genes | Genes in KEGG organisms that belong to this KO group. |
| Reference | Reference (authors, title and journal) information with PubMed IDs and DOIs, as well as links to functionally characterized sequence data. |
| LinkDB | 'All DBs' button in this field retrieves all available links to related database entries in the LinkDB system. At GenomeNet this field does not appear; instead a list of actual links is displayed on the right. |