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NIH Common Data Elements Repository
The NIH Common Data Elements (CDE) Repository has been designed to provide access to structured human and machine-readable definitions of data elements that have been... -
Retrovirus Resources
Information about retroviruses and specialized tools for the analysis of retroviral proteins and genomes. The tools on this page aid in the identification, study and analysis of... -
BLAST (Basic Local Alignment Search Tool)
BLAST (Basic Local Alignment Search Tool) finds regions of similarity between biological sequences. BLAST includes several specialized search interfaces: SmartBLAST, Primer-... -
Images from the History of Medicine
Images from the History of Medicine (IHM) in NLM Digital Collections provides online access to images from the historical collections of the U.S. National Library of Medicine.... -
Health Service Research (HSR) PubMed Queries
Health Service Research (HSR) PubMed Queries contains preformulated specialized PubMed searches on healthcare quality and costs. -
Constraint-Based Multiple Alignment Tool (COBALT)
Constraint-Based Multiple Alignment Tool (COBALT) is a protein multiple sequence alignment tool that finds a collection of pairwise constraints derived from conserved domain... -
Catalog Record Data
NLM produces bibliographic records for books, journals and other materials from NLM's collections in NLMXML, MARCXML and MARC 21 formats. These records can be searched at NLM... -
SPDI Variation Service
This genetic variation services interconvert and transform short genetic variants between HGVS expressions, VCF format, and the new SPDI (Sequence Position Deletion Insertion)... -
Conserved Domain Database (CDD)
Conserved Domain Database (CDD) is a protein annotation resource that consists of a collection of well-annotated multiple sequence alignment models for ancient domains and full-... -
NCBI Submission Portal
A single entry point for users to link to and find information about data submission processes at NCBI. -
Multiple Sequence Alignment (MSA) Viewer
An interactive Web application that enables users to visualize multiple alignments created by database search results or other software applications. The MSA Viewer allows users... -
Directory of History of Medicine Collections
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 subjects...