Tags: Biological Database, Database.
The Experimental Factor Ontology also known as EFO is an open access ontology of experimental variables particularly those used in molecular biology. The ontology covers variables which include aspects of disease anatomy cell type cell lines chemical compounds and assay information. EFO is developed and maintained at the EMBL-EBI as a cross-cutting resource for the purposes of curation querying and data integration in resources such as Ensembl ChEMBL and Expression Atlas.