1. Katchalski, E., Sela, M., Silman, H. I., and Berger, A., in The Proteins, edit. by Neurath, H., 2, 405 (Academic Press, Inc., New York, 1964).
2. Flitman, R., and Frieden, E., J. Amer. Chem. Soc., 79, 5198 (1957). Vercanteren, R., and Massart, L., in Oxygenases, edit. by Hayaishi, O., 305 (Academic Press, Inc., New York, 1962).
3. Wuthrich, K., and Fallab, S., Helv. Chim. Acta, 47, 1609 (1964).
4. Osaki, S., Walter, C., and Frieden, E., Biochem. Biophys. Res. Comm., 12, 1 (1963).
5. Hewitt, E. J., and Dickes, G. J., Biochem. J., 78, 384 (1960).