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

9 June 2022 - The ArrayExpress interface will close on 30th September 2022

The time has come to say goodbye to the old ArrayExpress interface and hello to the brand new ArrayExpress collection within BioStudies! All datasets have now been migrated from ArrayExpress database into BioStudies' ArrayExpress collection. We will therefore switch off the current ArrayExpress interface on the 30th of September. From this date

Final checklist:

  • If you are a submitter: Please activate your BioStudies account to view your private data and get links for reviewers. From the 30th of September you will also be using this account to do post-submission changes, i.e. update release dates or add publication records. (Note that Annotare will continue to serve as the submission tool, no change here.)
  • If you are using the ArrayExpress API for programmatic access, update your processes to use the new endpoints.

Please send any questions or feedback to


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.