EcoCyc Encyclopedia http://www.ecocyc.org/
Database that describes the genome and the biochemical machinery of E. coli, maintained by SRI International, Menlo Park, CA.
Laboratory Research Projects http://www.uky.edu/Pharmacy/ps/porter/
Studies on squalene monooxygenase dependent cholesterol biosynthesis, and the role of cytochrome P450 reductase as the electron transfer partner, by Todd D. Porter's group at the College of Pharmacy, Lexington, KY.
Metabolic Pathways http://www.sigmaaldrich.com/metabolicpathways/
IUBMB-Nicholson chart illustrating glycolytic pathway, Krebs Cycle, and over 500 enzyme reactions, with formulas, substrates, inhibitors and EC numbers. Available as PDF download, or to purchase from Sigma Chemical Co., St.Louis, MO.
LFT Metabolite Database http://cc.1asphost.com/Metabolites/
Searches on metabolites from carbohydrate, amino acid, fatty acid, nucleotide or other biochemical metabolism, including descriptions of the chemistry and function of biochemicals.
Pathway Hunter Tool http://www.pht.uni-koeln.de/
Metabolic pathway analysis webservice, including shortest, alternate path and network analysis from Cologne University Bioinformatics Center, Germany.