The phrase "a collection of databases" is correct and usable in written English.
It can be used when referring to multiple databases that are grouped together for a specific purpose or function.
Example: "The research team has created a collection of databases to store and analyze the data collected from various experiments."
Alternatives: "a set of databases" or "a group of databases".
Healthcare.gov is not so much a Web site as an interface for accessing a collection of databases and information systems.
Here you will find a collection of databases containing DNA and protein sequence, gene expression, cellular role, protein family, and taxonomic data for microbes, plants, and humans.
As purposely emphasized in this paper, the Dashboard is made up of a collection of databases that are integrated and surfaced through a single web-based interface via a set of tabs and subtabs using a chemical centric approach to integrating the data.
Briefly, each predicted protein was searched against a collection of databases (Priam, Uniref100, PFAM/TIGRFAM, CAZY, CDD) and motif finders (TMHMM, InterPro).
This example demonstrated how targeted searches through a collection of databases produces results that are of immediate interest to the neuroscience investigator.
Maternal country of birth was categorized into regions according to the Health Outcomes and Information Statistical Toolkit, which is a collection of databases maintained by the Epidemiology and Surveillance Branch of the NSW Department of Health (8).
We used three types of data to reconstruct the TRN, namely PPIs derived from a collection of PPI databases, PDIs from the TRANSFAC database, and the time course gene expression profiles as published by [2].
For example, The Cochrane Library is a collection of six databases that contain different types of research: Cochrane Database of Systematic Reviews; Cochrane Central Register of Controlled Trials; Cochrane Methodology Register; Database of Abstracts of Reviews of Effects; Heath Technology Assessment Database, and NHS Economic Evaluation Database.
Entrez is a collection of related databases of biological data, among which are the Entrez Nucleotide database of biological sequences, the RefSeq [ 3] database providing reference chromosome assemblies and transcribed sequences for several species, and the Entrez Gene [ 4] database cataloging known genes.
In order to evaluate these techniques in non-controlled environments, a collection of standard databases, well known in the surveillance research community, has been used: PETS 2006, PETS 2007, PETS 2009 and CAVIAR.
KEGG Pathway is a collection of online databases for systematic analysis of gene functions in the known molecular pathways [33].
