BRENDA - Comprehensive enzyme information system
Douglas Kell Metabolomic Links
HumanCyc - a bioinformatics database that describes the human metabolic pathways and the human genome
MetaCyc - a database of nonredundant, experimentally elucidated metabolic pathways. MetaCyc contains 700 pathways from more than 600 different organisms
Consortium for Functional Glycomics - a comprehensive and regularly updated resource for functional glycomics research
EUROCarbDB - A glycobiology database providing support for research on post-translational modifications, Glycomics, Glyco-proteomics and Structural Medicine