Kyoto Encyclopedia of Genes and Genomes; or K.E.G.G., as it is commonly called; is a collection of online databases dealing with genomes, enzymatic pathways, and biological chemicals. The Pathway Database ,records networks of molecular interactions in cells and their variants (specific to particular organisms.) K.E.G.G. switched to a subscription model, accessible via FTP in July, 2011.
The Kyoto Encyclopedia of Genes and Genomes was initiated by the Japanese human genome program in 1995. According to the developers KEGG is a "computer representation" of the biological system. The KEGG database can be utilized for modeling and simulation, browsing and retrieval of data. It is a part of the systems biology approach.