1. Kurland, C. G. in Molecular Mechanisms of Protein Biosynthesis (eds Weissbach, H. and Pestka, S.) Academic Press, New York, 81 (1977).
2. Roberts, B. E. and Paterson, B. M. PNAS, 70, 2330 (1973).
3. Gross, K., Probst, E., Schaffner, W. and Birnstiel, M. Cell, 8, 455 (1973).
4. Strohman, R. C., Moss, P. S., Micou-Eastwood, J., Spector, D., Przybyla, A. and Paterson, B. Cell, 10, 265 (1977).
5. Heywood, S. M., Kennedy, D. S. and Bester, A. J. PNAS, 71, 2428 (1974).