View Scenarios page. A genome-specific reaction network can be viewed on a scenario by scenario basis. The scenarios are organized on the left by subsystems, which are themselves organized by categories of metabolic function. If a path through a scenario was found in a given subsystem, the subsystem name is highlighted in blue. In this case, one path was found through the Uroporphyrinogen III generation scenario in the Porphyrin, Heme and Siroheme Biosynthesis subsystem. The table to the right shows the input and output compounds for the scenario, including their stoichiometry, and the reactions that make up the path through the scenario.