MetaCyc database http://metacyc.org/ MetaCyc is a database of metabolic pathways containing more than 1400 pathways from more than 1800 organisms. KEGG pathway database http://www.genome.jp/kegg/pathway.html The KEGG pathway database consists of a collection of manually-curated metabolic maps with connections to metabolite, enzyme and organismal data. KEGG also contains tools for reconstructing...