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Conserved Domain Database (CDD)
CDD is a protein annotation resource that consists of a collection of well-annotated multiple sequence alignment models for ancient domains and full-length proteins. -
PubMed
PubMed comprises more than 26 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content... -
ChemSpell Web Service API
The ChemSpell Web Service API provides chemical name spell checking and chemical name synonym look-up. ChemSpell contains more than 1.3 million chemical names related to... -
Semantic Knowledge Representation (SKR) API
The SKR Project was initiated at NLM in order to develop programs to provide usable semantic representation of biomedical free text by building on resources currently available... -
ClinicalTrials.gov
Provides patients, family members, health care professionals, and members of the public easy access to information on clinical trials for a wide range of diseases and conditions. -
Profiles in Science
This site celebrates twentieth-century leaders in biomedical research and public health. It makes the archival collections of prominent scientists, physicians, and others who... -
TOXNET
A cluster of databases on toxicology, hazardous chemicals, and related areas. -
National Library of Medicine Learning Resources Database
A database of tutorials and other learning resources produced by the National Library of Medicine. -
MedlinePlus
MedlinePlus is the National Institutes of Health's Web site for patients and their families and friends. Produced by the National Library of Medicine, the world’s largest... -
BioSample
The BioSample database contains descriptions of biological source materials used in experimental assays. -
ChemIDplus
Chemical database is a dictionary of over 400,000 chemicals (names, synonyms, and structures). ChemIDplus includes links to NLM and other databases and resources, including... -
RxTerms
RxTerms is a drug interface terminology derived from RxNorm for prescription writing or medication history recording (e.g. in e-prescribing systems, PHRs). RxTerms is derived... -
Unified Medical Language System Terminology Services (UTS) API
The UTS API is intended for application developers to perform Web service calls and retrieve UMLS data within their own applications. The UTS API provides the ability to search,... -
Gene
Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to... -
BioSystems
The NCBI BioSystems Database provides integrated access to biological systems and their component genes, proteins, and small molecules, as well as literature describing those... -
NLM Digital Collections
The National Library of Medicine's (NLM) Digital Collections offers a search-based Web service that provides access to the Dublin Core metadata and full-text OCR of every... -
MetaMap
MetaMap is a highly configurable application developed by the Lister Hill National Center for Biomedical Communications at the National Library of Medicine (NLM) to map... -
RxClass
The RxClass Browser is a web application for exploring and navigating through the class hierarchies to find the RxNorm drug members associated with each class. RxClass links... -
AccessGUDID
The Global Unique Device Identification Database (GUDID) contains key device identification information submitted to the FDA about medical devices that have Unique Device... -
TOXMAP®: Environmental Health Maps
TOXMAP® is a Geographic Information System (GIS) that uses maps of the United States and Canada to help users visually explore data primarily from the EPA's Toxics Release...