BRENDA	Enzyme names and biochemical properties
ENZYME	Enzyme nomenclature and properties
EzCatDB	Enzyme Catalytic Mechanism Database
IntEnz	Integrated enzyme database and enzyme nomenclature
PDBrtf	Representation of target families of enzymes in PDB
SCOPEC	Mapping of catalytic function to domain structure
BioSilico	Integrated access to various metabolic databases
KEGG	Pathway Metabolic and regulatory pathways in complete genomes
MetaCyc	Metabolic pathways and enzymes from various organisms
PathDB	Biochemical pathways, compounds and metabolism
UM-BBD	University of Minnesota biocatalysis and biodegradation database
aMAZE	A system for the annotation, management, and analysis of biochemical andsignalling pathway networks
BIND	Biomolecular interaction network database
BioCarta	Online maps of metabolic and signaling pathways
BRITE	Biomolecular relations in information transmission and expression, part of KEGG
DDIB	Database of domain interactions and binding
GeneNet	Database on gene network components
HPID	Human protein interaction database
InterDom	Putative protein domain interactions
PDZBase	Protein–protein interactions involving PDZ domains
POINT	Prediction of human protein–protein interactome
PSIbase	Interaction of proteins with known 3D structures
Reactome	A knowledgebase of biological pathways
STCDB	Signal transductions classification database
STRING	Predicted functional associations between proteins
TRANSPATH	Gene regulatory networks and microarray analysis