1. Baglioni, C., Molecular Genetics (edit. by Taylor, J. H.), 1, 405 (Academic Press, New York and London, 1963).
2. London, I. M., Tavill, A. S., Vanderhoff, G. A., Hunt, T., and Grayzel, A. I., Develop. Biol., suppl. 1, 227 (1967).
3. Baglioni, C., and Campana, T., Europ. J. Biochem., 2, 450 (1967).
4. Shaeffer, J. R., Trostle, P. K., and Evans, R. F., Science, 158, 488 (1967).
5. Hunt, T., Hunter, A. R., and Munro, A. J., J. Mol. Biol., 36, 31 (1968).