Figure 3.

Euler diagram of results from a microarray experiment comparing stellate cells with fibroblasts. A visualization of gene sets differentially expressed between specialized mesenchymal cells (stellate cells) and normal skin fibroblasts (minimum total number of genes per category: 100; max p-value: 0.025) is shown [8]. Although a total of 8 ontology categories were reported to be significantly enriched among the changed genes, the analysis revealed that those categories strongly overlap and form a single large cluster of cell surface/extracellular matrix-related categories. The corresponding directed acyclic graph is not shown. None of the categories (except for extracellular space/matrix as a descendant of extracellular) form direct or indirect parent/child relationships.