1. Ames, B. N., Durston, W. E., Yamasaki, E. and Lee, F. D. (1973). Proc. Nat. Acad. Sci. U.S.A. 70, 2281–2285.
2. Blanco, M. and Devoret, R. (1973). Mutat. Rea 17, 293–305.
3. Bowersock, D. and Moses, R. E. (1973). J. Biol. Chem. 248, 7449–7455.
4. Boyle, J. M. and Setlow, R. B. (1970). J. Mol. BioL 51, 131–144.
5. Bressler, S. E., Lanzov, V. A. and Lujaniec-Blinkova, A. A. (1968). Mol. Gen. Genet. 102, 169–284.