- Partitioning and plasticity of repressive histone methylation states in mammalian chromatin. Peters, A.H., Kubicek, S., Mechtler, K., O'Sullivan, R.J., Derijck, A.A., Perez-Burgos, L., Kohlmaier, A., Opravil, S., Tachibana, M., Shinkai, Y., Martens, J.H., Jenuwein, T. Mol. Cell (2003)