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 yesterday at 06:00
  • 51263 experiments
  • 1488463 assays
  • 24.31 TB of archived data

Latest News

11 June 2014 - Annotare - making submissions easier
Are you planning to submit microarray or sequencing data to ArrayExpress? If yes, we are pleased to introduce our new submission tool Annotare. With webforms guiding you step by step, submitting to ArrayExpress has never been easier. It also features automatic checking prior to submission so that we can get your experiment quickly into ArrayExpress. So whether you're a new or returning submitter, why not give it a try? Annotare help is at hand for more details.


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.