ArrayExpress - functional genomics data

ArrayExpress is a database of functional genomics experiments that can be queried and the data downloaded. It includes gene expression data from microarray and high throughput sequencing studies. Data is collected to MIAME and MINSEQE standards. Experiments are submitted directly to ArrayExpress or are imported from the NCBI GEO database.

Data Content

Updated today at 06:00
  • 53589 experiments
  • 1577579 assays
  • 25.38 TB of archived data

Latest News

30 July 2014 - Submitting a sequencing experiment to ArrayExpress?
You can now do so via Annotare. Please take a look at this sequencing submission help page before you start, so you'll have all the required meta-data and raw data files ready. Since the storage of meta-data and raw files is split between ArrayExpress and ENA, once your submission is fully processed, it is a rather lengthy process to modify or update it. So if you could try and get your submission in the best possible shape, we will be able to process it more quickly and avoid retrospective fixes where possible. Annotare help is at hand too if you need it. Happy submitting!


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

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.