1. Introduction - Developments in Enzymatic and Model Studies on Oxygenases T. Funabiki. 2. Dioxygenases T. Funabiki. 3. Iron Model Studies on Dioxygenases T. Funabiki. 4. Non-Iron Model Studies on Dioxygenases A. Nishinaga. 5. Heme Monooxygenases - A Chemical Mechanism for Cytochrome P450 Oxygen Activation H. Shimada, et al. 6. Model Studies on Heme Monoxygenases Y. Watanabe. 7. Nonheme Monooxygenases M. Kodera, et al. 8. Model Studies on Nonheme Monooxygenases - Chemical Models for Nonheme Iron and Copper Monooxygenases M. Ito, et al. Index.