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1. Searching
   1. Keyword Queries
   2. Advanced Queries
      1. Chemical–Gene Interactions
      2. Chemical–Gene Interaction Results
      3. Genes
      4. Gene Results
      5. References
      6. Reference Results
2. Tools
   1. Batch Query
   2. VennViewer
   3. MyGeneVenn
3. Data
   1. Chemicals
      1. Chemical–Gene Interactions
      2. Interacting Genes
      3. ChemComps
      4. Chemical Diseases
      5. Chemical Pathways
      6. Chemical References
      7. Chemical Links
   2. Diseases
      1. Disease Chemicals
      2. Disease Chemical–Gene Interactions
      3. Disease Genes
      4. Disease Pathways
      5. Disease References
   3. Genes
      1. Interacting Chemicals
      2. Gene–Chemical Interactions
      3. GeneComps
      4. Gene Diseases
      5. Gene Pathways
      6. Gene References
      7. Gene GO Annotations
      8. Gene Links
   4. Gene Ontology (GO)
   5. Organisms
   6. References
      1. Reference Chemical–Gene Interactions
      2. Reference Diseases
   7. Relationships
      1. Chemical–Disease Relationships
      2. Gene–Disease Relationships
4. Other
   1. Linking to CTD Data
   2. CTD Email List
   3. Citing CTD