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• General
  • What is CTD?
  • What can I do with CTD?
  • Does CTD sell chemicals or recommend suppliers?
  • How do I find out more about a chemical?
  • When is data updated?
  • How are papers chosen for inclusion?
  • How do I request curation of a paper?
  • How do I subscribe to or unsubscribe from the CTD email list?
  • How do I cite CTD?
  • How do I get data from a batch query?
  • How do I link to CTD data?
  • How do I contact CTD staff?
  • What technology powers CTD?
• Genes, Chemicals, Interactions, and References
  • How do I perform a keyword search?
  • How do I perform an advanced search for a gene?
  • Were any puffins harmed in the making of CTD?
  • How do I find a chemical?
  • How do I find chemical–gene interactions?
  • How do I find what kinds of genes (GO terms) interact with a chemical?
  • How do I find out if several genes interact with the same chemicals?
  • How do I find a reference?
  • How do I find the references supporting a chemical, gene, or disease relationship?
• Diseases
  • How do I find a disease?
  • How do I find chemical–disease relationships?
  • How do I find gene–disease relationships?
• Biochemical Pathways
  • How do I use KEGG or REACTOME pathways with CTD?
  • How do I find the genes associated with a pathway?
  • How do I find the pathways associated with a gene?
  • How do I find the pathways affected by a chemical?
• Sample Queries
  • What human diseases are associated with the gene HMOX1?
  • What human diseases are associated with the chemical arsenic?
  • What genes interact with the chemical estradiol?
  • What chemicals interact with the gene MAPK1?
  • What references report an interaction between the chemical zinc and the gene ICAM1?
  • What transcription factors have their activity affected by heavy metals?
  • How does the chemical resveratrol affect the gene p53?
  • What are the molecular functions, biological processes, and cellular components (GO terms) of genes that interact with the chemicals TCDD or bisphenol A?
  • What chemicals are associated with lung cancer?
  • What genes interact with all three chemicals estradiol, progesterone and vitamin D?

How do I find a chemical?

You may either perform a chemical keyword search (select Chemicals from the drop-down list), or you may select Chemicals under the Search menu and browse through the hierarchy.