The Metabolic Modeling and Flux Balance Analysis (FBA) Server provides programmatic remote access to the Model SEED biochemistry and genome-scale metabolic model database, as well as some model analysis algorithms. The Model SEED biochemistry database integrates into a single, nonredundant set all the reactions and compounds found in the Kyoto Encyclopedia of Genes and Genomes (KEGG) database [24, 25, 26] , together with additional curated reactions and compounds [18] , and a continuously growing number of published genome-scale metabolic models.