It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
BioCyc is a collection of 7613 Pathway/Genome Databases (PGDBs), plus software tools for understanding their data. Tier 1 databases have received at least one person-year of literature-based curation, and are the most accurate. EcoCyc and MetaCyc have each received more than 20 person-years of curation.
Tier 2 and Tier 3 databases contain computationally predicted metabolic pathways, predictions as to which genes code for missing enzymes in metabolic pathways, and predicted operons.-From Publisher
PubMed Health is a service of the National Center for Biotechnology Information (NCBI) at the U.S. National Library of Medicine (NLM). PubMed contains journal articles in medicine, nursing, dentistry, veterinary medicine, and the health care system. For most effective use of this resource, be sure to create a personalized account.