Figure 5

Pathway ontology shown with proposed ERSF layout. The hierarchical structure of the ontology is clear in this view. The depth of the ontology tree, six, can be seen by counting the number of rings in the display. There are many pathways that belong to at least two categories, e.g., three pathways from individual amino acids biosynthesis (on right) also belong to the category amino acids degradation (on left). Also many pathways from aldehyde degradation (on the left of 3rd layer) belong to the category methylglyoxal detoxification. This kind of multiple inheritance information is difficult to see in other visualization methods.