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MEDLINE Databank Sources
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MEDLINE citations may carry the databank names listed in the two tables shown below. The ClinicalTrial data repositories are listed in the first table and the second table contains other data sources such as Molecular Sequence Data; Gene Expression Data; PubChem Identifiers; BioProject Identifiers; and other scientific data repository identifiers.

These databank names appear in the DatabankName element of the XML version of the citation.

In PubMed the DatabankName XML element is called the Secondary Source ID and is designated as SI in the MEDLINE and Abstract displays.

To search for the presence of a databank source value (SI) in PubMed, regardless of the specific value, search: hasdatabanklist

To search for a specific value of a data source search the databank name abbreviation, qualified by [SI], in PubMed. Example: ANZCTR [SI]

More information on the Databank Sources (Secondary Source (SI)) is available at:

Trial Registry Abbreviation Clinical Trial Registry Full Name Approximate Start Date
ANZCTR Australian New Zealand Clinical Trials Registry 2014
ChiCTR Chinese Clinical Trials Registry 2014
CRiS Clinical Research Information Service, Republic of Korea 2014 Database (NIH/NLM) 2005
CTRI Clinical Trials Registry - India 2014
DRKS German Clinical Trials Register 2014
EudraCT EU Clinical Trials Register 2014
IRCT Iranian Registry of Clinical Trials 2014
ISRCTN International Standard Randomized Controlled Trial Number ( Register 2006
JapicCTI Japan Pharmaceutical Information Center (Japan Registry Member) 2017
JMACCT Center for Clinical Trials, Japan Medical Association (Japan Registry Member) 2017
JPRN Japan Primary Registries Network (info in English at WHO site) 2014
NTR The Netherlands National Trial Register 2014
PACTR Pan African Clinical Trial Register 2014
ReBec Brazilian Clinical Trials Registry 2014
REPEC Peruvian Clinical Trial Registry 2018
RPCEC Cuban Public Registry of Clinical Trials 2014
SLCTR Sri Lanka Clinical Trials Registry 2014
TCTR Thai Clinical Trials Registry 2014
UMIN CTR University Hospital Medical Information Network Clinical Trial Registry (Japan Registry Member) 2017

MEDLINE Databank Name Abbreviation Databank Full Name Approximate Start Date
BioProject BioProject Database (NIH/NLM) 2014
dbGaP Database of Genotypes and Phenotypes (NIH/NLM) 2014
dbSNP Database of Short Genetic Variations (NIH/NLM) 2014
dbVar Database of Genomic Structural Variation (NIH/NLM) 2014
Dryad Dryad 2014
figshare figshare 2014
GDB Johns Hopkins University Genome Data Bank (ceased in 2008) 1988
GENBANK GenBank Nucleic Acid Sequence Database (NIH/NLM) 1988
GEO Gene Expression Omnibus Database (NIH/NLM) 2006
OMIM Mendelian Inheritance in Man (McKusick) 1988
PDB Protein Data Bank (NIH/NLM) 1988
PIR Protein Identification Resource 1988
PubChem-BioAssay PubChem BioAssay Database (NIH/NLM) 2007
PubChem-Compound PubChem Compound Database (NIH/NLM) 2007
PubChem-Substance PubChem Substance Database (NIH/NLM) 2007
RefSeq Reference Sequence Database (NIH/NLM) 1988
SRA Sequence Read Archive (SRA) Database (NIH/NLM) 2014
SWISSPROT Protein Sequence Database 1988
UniMES UniProt Metagenomic and Environmental Sequences Database 2014
UniParc UniProt Archive Database 2014
UniProtKB UniProt Knowledgebase Database 2014
UniRef UniProt Reference Clusters Database 2014

Last Reviewed: December 14, 2023