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

25 April 2017 - We will soon be moving our helpdesk and submission email ticketing system

If you are one of our users or submitters who have been in touch with us before, you may have got used to the email headers or format of our replies. Our ticketing system is coming up 10 years old, and it is time to migrate onto a more efficient system with new software and hardware. The migration will not affect our services, so you can continue to submit experiments via Annotare, drop us submission-related queries at, or send us questions about ArrayExpress at The email headers or format will look a little different after the migration, but don't be alarmed, we are not spamming you!


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.