BiGG Models is a knowledgebase of genome-scale metabolic network reconstructions. BiGG Models integrates more than 70 published genome-scale metabolic networks into a single database with a set of stardized identifiers called BiGG IDs. Genes in the BiGG models are mapped to NCBI genome annotations, and metabolites are linked to many external databases (KEGG, PubChem, and many more). For details ab