1. R. J. Suhadolnik, Nucleoside Antibiotics, Wiley—Interscience, New York (1970); Nucleosides as Biochemical Probes, Wiley—Interscience, New York (1979); L. B. Townsened, in Handbook of Biochemistry and Molecular Biology, 3rd ed., (G. D. Fasman, ed.), Vol. 1, p. 271, CRC Press, Columbus, Ohio (1975).
2. F. F. Davis and F. W. Allen, J. Biol. Chem. 227, 907 (1957); W. E. Cohn, Fed. Proc. 16, 166 (1957).
3. R. Shapiro and R. W. Chambers, J. Am. Chem. Soc. 83, 3290 (1961).
4. A. M. Michelson and W. E. Cohn, Biochemistry 1, 490 (1962); R. W. Chambers, Prog. Nucleic Acid Res. Mol. Biol. 5, 349 (1966).
5. R. Cortese, H. O. Kammen, S. J. Spengler, and B. N. Ames, J. Biol. Chem. 249, 1103 (1974).