ArrayExpress – functional genomics data

ArrayExpress Archive of Functional Genomics Data stores data from high-throughput functional genomics experiments, and provides these data for reuse to the research community.

Latest News

1 August 2017 - Upcoming Downtime: ArrayExpress submission system will be unavailable from Friday 18 August 2017 until Monday 21 August 2017

Due to essential maintenance, we'll have to shut down the ArrayExpress submission tool Annotare. We would like to ask submitters to log out of Annotare before the maintenance period, and return after the weekend to continue with the submission. All information entered and files uploaded in Annotare are automatically saved, so rest assured that nothing will be lost.

We hope to keep the downtime to a minimum and will be able to accept submissions again from 21 August 2017. We will make timely announcements on our Twitter feed. Sorry for any inconvenience this may cause.


Information about how to search ArrayExpress, understand search results, how to submit data and FAQ can be found in our Help section.

Find out more about the Functional Genomics group.

Tools and Access

Annotare: web-based submission tool for ArrayExpress.

ArrayExpress Bioconductor package: an R package to access ArrayExpress and build data structures.

Programmatic access: query and download data using web services or JSON.

FTP access: data can be downloaded directly from our FTP site.

Related Projects

Discover up and down regulated genes in numerous experimental conditions in the Expression Atlas.

Explore the Experimental Factor Ontology used to support queries and annotation of ArrayExpress data.