Researchers have identified a group of proteins that are mutated in about one-fifth of all human cancers. The finding suggests that the proteins, which are members of a protein complex that affects how DNA is packaged in cells, work to suppress the development of tumors in many types of tissues.<img src="http://feeds.feedburner.com/~r/sciencedaily/~4/_PWPcNBi378" height="1" width="1"/>
