1. Andrulis IL, Chen J and Ray PN . (1987). Mol. Cell Biol., 7, 2435–2443.
2. Balestar E, Paz MF, Valle L, Wei S, Fraga MF, Espada J, Cigudosa JC, Huang TH and Esteller M . (2003). EMBO J., 22, 6335–6345.
3. Bird A . (2002). Genes Dev., 16, 6–21.
4. Bird AP and Wolffe AP . (1999). Cell, 99, 451–454.
5. Boyd KE, Wells J, Bartley SM and Farnham PJ . (1998). Proc. Natl. Acad. Sci., 95, 13887–13892.