1. Ertel, R., Redfield, B., Brot, N., and Weissbach, H., Arch. Biochem. Biophys., 128, 331 (1968).
2. Ravel, J. M., Shorey, R. L., and Shive, W., Biochem. Biophys. Res. Commun., 32, 9 (1968).
3. Erbe, R. W., and Leder, P., Biochem. Biophys. Res. Commun., 31, 798 (1968).
4. Monro, R. E., Maden, B. E. H., and Traut, R. R., Symp. Fed. Europ. Biochem. Soc. (edit. by Shugar, D.), 179 (Academic Press, London, 1967).
5. Noll, H., Control of Organelle Development, Soc. Exp. Biol. Symp. No. 24 (in the press).