1. Antequera, F., Boyes, J. and Bird, A. (1990) High levels of de novo methylation and altered chromatin structure at CpG island in cell lines. Cell 62, 503–514.
2. Becker, K.G., Swergold, G.D., Ozato, K. and Thayer, R.E. (1993) Binding of the ubiquitous nuclear transcription factor YY1 to cis regulatory sequence in the human LINE-1 transposable element. Hum. Mol. Genet. 2, 1697–1702.
3. Bednarik, D.P., Duckett, C., Kim, S.U., Perez, V.L., Griffis, K., Guenthner, P.C. and Folks, T.M. (1991) DNA CpG methylation inhibits binding of NF-kB proteins to the HIV-1 long terminal repeat cognate DNA motifs. New Biol. 3, 969–976.
4. Bird, A.P. (1986) CpG-rich islands and the function of DNA methylation. Nature 321, 209–213.
5. Bratthauer, G.L. and Fanning, T.G. (1992) Active LINE-1 retrotransposons in human testicular cancer. Oncogene 7, 507–510.