Heterochromatin is a tightly packed form of DNA that is essential for cell survival. A European-backed project has investigated the molecules that control its formation and maintenance.
Associated with the formation of centromeres and telomeres, heterochromatin is linked with the proper segregation of genetic material during cell division. Heterochromatin structure is also implicated in gene expression. Despite its importance in cellular genetic control, the formation of this material is poorly understood.
Further information: The secrets of heterochromatin