Age-related increase in methylation of ribosomal genes and inactivation of chromosome-specific rRNA gene clusters in mouse.
Swisshelm K, Disteche CM, Thorvaldsen J, Nelson A, Salk D. Age-related increase in methylation of ribosomal genes and inactivation of chromosome-specific rRNA gene clusters in mouse. Mutat Res. 1990 May-Jul; 237(3-4):131-46.