The EcoCyc and MetaCyc databases

EcoCyc is an organism-specific Pathway/Genome Database that describes the m etabolic and signal-transduction pathways of Escherichia coli, its enzymes, and-a new addition-its transport proteins. MetaCyc is a new metabolic-path way database that describes pathways and enzymes of many different organism s, with a microbial focus. Both databases are queried using the Pathway Too ls graphical user interface, which provides a wide variety of query operati ons and visualization tools, EcoCyc and MetaCyc are available at http://eco cyc.PangeaSystems.com/ecocyc/.