

Resources
Kimball's Biology Pages - Huge index of information on many specific biological topics
Tools
UCSC Genome Browser and Ensembl - Browse the genomes of sequenced organisms while viewing many different types of annotations
Cytoscape - Program for visualization and analysis of molecular interaction networks
Graphviz - Program for visualization of general graphs
Grasper - Suite of tools for working with graphs
Graemlin - Multiple alignment of protein interaction networks
MOMA - Analysis of optimality in natural and perturbed metabolic networks
UCSD System Biology Downloads - Software tools for flux balance and extreme pathway analysis
VisANT - Visual Analysis Tool for Biological Networks and Pathways
Databases
KEGG - Databases of known pathways, genes, and reactions
Reactome - A pathway database
COG - Classification of proteins based on phylogenetic relationships
STRING - Search Tool fort he Retrieval of Interacting Genes/Proteins
SCOP - A hierarchical database of protein families organized based on structure
Stanford MicroArray Database - Repository of microarray experiment data
Metacyc - Database of metabolic reactions for 600+ organisms
UCSD Systems Biology Reconstructions - High-quality reconstructions of several network types for a few organisms.
ENZYME - An enzyme nomenclature database
Brenda - Large database of enzymes with functional information
DIP - Database of interacting proteins
MINT - Molecular interactions database with a focus on known protein interactions from the literature
Saccharomyces Genome Database - Huge database of information on Saccharomyces (yeast) genomes
NCBI Gene Expression Omnibus - NCBI's database of expression data
The BioGRID - A repository for various types of biological interaction datasets
Resources for Fungal Comparative Genomics
InterDom - Database of putative interacting proteins
Datasets
Segal Lab datasets - Annotation and expression datasets from Eran Segal's lab
See supplementary data from:
Blank, L. M., Kuepfer, L., and Sauer, U. 2005. 13 C-flux analysis reveals mechanistic principles of metabolic network robustness to null mutations in yeast. Genome Biol. 6: R49.
Kuepfer, L., Sauer, U., and Blank, L. M. 2005. Metabolic functions of duplicate genes in Saccharomyces cerevisiae. Genome Res. 15: 1421-1430.