Fig. 2From: Diffany: an ontology-driven framework to infer, visualise and analyse differential molecular networksInteraction ontology. Default edge ontology structure, with activity flow interaction types on the left, and process types on the right. Root categories are shown with black borders, and have a default symmetry state: directed (→) or symmetrical (-). Because of space constraints, not all PTM (post-translational modification) subclasses are shownBack to article page