Figure 2.

Agents tested in Division of Cancer Prevention assays. A) Number of agents tested in morphologic and animal tumor assays. B) Classes of agents tested. The 210 agents were representative of many functional or biological categories. To illustrate, each agent was assigned to the “best” category, where the best category was considered the more specific or more common category. For example, many agents with antioxidant activity were reported under specific enzyme or pathway activities.