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

21 May 2019 - Upcoming Downtime: ArrayExpress submission system will be unavailable on Thursday 30 May 2019

Due to essential maintenance, we'll have to shut down the ArrayExpress submission tool Annotare on Thursday 30 May. Unfortunately, uptime of ArrayExpress may also be affected.

We would like to ask submitters to log out of Annotare before the maintenance period, and return after the weekend to continue with your 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 hope to return to our normal service again from 31 May 2019. Follow our Twitter feed for real-time updates. 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.