Database
URL
Feature
KEGG
http://www.genome.jp/kegg/
Protein structure repository that provides tools for analyzing these structures
BioCyc
http://www.biocyc.org/
Classification of protein 3D structures in a hierarchical scheme of structural classes
BRENDA
http://www.brenda-enzymes.org/
Hierarchical classification of protein domain structure
EMP
http://emp.mcs.anl.gov/
Database of Enzymes and Metabolic pathways public server
BRITE
http://www.genome.jp/kegg/brite.html
Biomolecular Relations in Information, Transmission and Expression