EVIDENCE FOR DEGENERACY AND AMBIGUITY IN INTERSPECIES AMINOACYL-SRNA FORMATION.

1 Warner, J. R., P. M. Knopf, and A. Rich, these PROCEEDINGS, 49, 122 (1963). 2 Gierer, A., J. Mol. Biol., 6, 148 (1963). 3 Wettstein, F. O., T. Staehlin, and H. Noll, Nature, 197, 430 (1963). 4 Gilbert, W., J. Mol. Biol., 6, 374 (1963). 5 Clark, M. F., R. E. F. Matthews, and R. K. Ralph, Biochem. Biophys. Res. Comm., 13, 505 (1963). 6 Warner, J. R., A. Rich, and C. E. Hall, Science, 138, 1399 (1962). 7 Horse spleen ferritin was kindly supplied by Dr. A. Mazur, and human plasma albumin was prepared in our laboratory by curtain electrophoresis. 8 Daniel, T. M., J. G. M. Weyland, Jr., and A. B. Stavitsky, J. Immunol., 90, 741 (1963). 9 Dobry-Duclaux, A., Biochim. Biophys. Acta, 38, 33 (1960). 10 Rabbit reticulocytes were kindly supplied by Dr. John R. Warner. 11 Kunkel, H. G., in The Plasma Proteins, ed. F. W. Putman (Academic Press, 1960), vol. 1, p. 279. 1" Penman, S., K. Scherrer, Y. Becker, and J. E. Darnell, these PROCEEDINGS, 49, 654 (1963). 13 Edelman, G. M., D. E. Olins, J. A. Gally, and N. D. Zinder, these PROCEEDINGS, 50, 753 (1963).