Fig. 7.

Utility of ontology terms for retrieval of datasets comparing isolated human and mouse cells. a A search for “endothelial cell” returns a results page with links to two different data types for isolated human endothelial cells and five for isolated mouse endothelial cells. b Selecting “Proteomics” for “Homo sapiens” returns a list of proteins found in isolated human lung cells, including endothelial, epithelial, immune, and mesenchymal cells. Shown are protein expression levels for the ATP-binding cassette C4 (ABCC4) transmembrane protein, also known as multidrug resistance-associated protein 4, which is highly expressed in endothelial cells compared to other cell types