58 BIOLOGICAL EFFECTS OF LOW LEVEL EXPOSURES
DNA Repair in Rodents: A Preliminary Study,” Mech. Age Develop.
48:135-143 (1989).- Travali, S., J. Koniecki, S. Petralia, and R. Baserga. “Oncogenes in Growth
and Development,” FASEB J. 4:3209-3214 (1990). - Hass, B., B. Lyn-Cook, L. Poirier, and R. Hart. “Differences in Growth Rate
and DNA Methylation and in c-Ha-ras in Pancreatic Acinar Cells of Brown-
Norway Rats Fed ad libitum and Caloric Restricted Diets,” Proc. Amer. Assoc.
Cancer Res. 32:862 (1991). - Poirier, L., W. Zapisek, and B. Lyn-Cook. “Physiological Methylation in Car
cinogenesis,” in Mutation and Environment. Part D (New York: Wiley-Liss,
1991), pp. 97-112. - Lindahl, T., B. Sedgwick, M. Sekiguchi, and U. Nakabeppu. “Regulation and
Expression of the Adaptive Response to Alkylating Agents,” Ann. Rev. Bio-
chem. 57:133-157. - Tano, K., S. Shiota, J. Collier, R. Foote, and S. Mitra. “Isolation and Struc
tural Characterization of a cDNA Clone Encoding the Human DNA Repair
Protein for 0 6-Alkylguanine,” Proc. Nat. Acad. Sci. 87:686-690 (1990). - Saffhill, R., G. Margison, and P. O’Conner. “Mechanisms of Carcinogenesis
Induced by Alkylating Agents,” Biophys. Acta 823:111-145 (1985). - Swenburg, J., M. Dyroff, J. Bedell, J. Popp, N. Huh, U. Kirstein, and M.
Rajewsky. “0 4-Ethyldeoxythymidine, But Not 0 6-Methyldeoxyguanosine,
Accumulates in Hepatocyte DNA of Rats Exposed Continually to Diethylnitro-
samine,” Proc. Nat. Acad. Sci. 81:1692-1695 (1984). - Pegg, A. “Properties of Mammalian 0 6-Alkylguanine-DNA Transferases,”
Mutat. Res. 233:165-175 (1990). - Boxenbaum, H. “Assessing the Nature and Quality of the Hormesis Database,”
this volume.