Data Catalog

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  PubChem

  U.S. Department of Health & Human Services —

  PubChem contains the chemical structures of small organic molecules and information on their biological activities. PubChem includes substance information, compound...

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• Federal

  MedGen

  U.S. Department of Health & Human Services —

  MedGen is NCBI's portal to information about conditions and phenotypes related to Medical Genetics. Terms from the NIH Genetic Testing Registry (GTR), UMLS, HPO,...

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• Federal

  Open Reading Frame Finder (ORF Finder)

  U.S. Department of Health & Human Services —

  A graphical analysis tool that finds all open reading frames in a user's sequence or in a sequence already in the database.

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• Federal

  Conserved Domain Database (CDD)

  U.S. Department of Health & Human Services —

  Conserved Domain Database (CDD) is a protein annotation resource that consists of a collection of well-annotated multiple sequence alignment models for ancient...

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• Federal

  Multiple Sequence Alignment (MSA) Viewer

  U.S. Department of Health & Human Services —

  An interactive Web application that enables users to visualize multiple alignments created by database search results or other software applications. The MSA Viewer...

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• Federal

  MeSH 2025 Update - Update All Fields Report

  U.S. Department of Health & Human Services —

  (Includes MeSH 2023 and 2024 changes) The MeSH 2025 Update - Update (All Fields) Report lists each individual modification made to a Descriptor or Supplementary...

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• Federal

  List of Serials Indexed for Online Users (LSIOU)

  U.S. Department of Health & Human Services —

  The List of Serials Indexed for Online Users (LSIOU) provides bibliographic information for all journals whose articles were ever indexed over time with the MeSH®...

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  UniVec

  U.S. Department of Health & Human Services —

  UniVec and UniVec_Core databases in FASTA format.

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  Sequence Set Browser

  U.S. Department of Health & Human Services —

  This site is for browsing WGS (Whole Genome Shotgun) genomes, TSA (Transcriptome Shotgun Assemblies) and TLS (Targeted Locus Study) sets. WGS sequences are incomplete...

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  Directory of History of Medicine Collections

  U.S. Department of Health & Human Services —

  The collections described in this Directory database provide research and reference services to scholars interested in the history of the health sciences. Some of the...

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  Bookshelf

  U.S. Department of Health & Human Services —

  A collection of online books and documents in life science and healthcare whose full text can be searched through the Entrez system. Bookshelf provides free online...

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  BioSample

  U.S. Department of Health & Human Services —

  The BioSample database contains descriptions of biological source materials used in experimental assays.

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You can also access this registry using the API (see API Docs).

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