http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. UCSF scientists have created a method of quickly identifying large numbers of the genetic material known as short hairpin RNA - also called shRNA - that turns genes on and off. http://www.physorg.com/news161946389.html Biology Tue, 19 May 2009 10:07:04 EST news161946389 Genes that inhibit the spontaneous development of cancer are called tumor suppressor genes. One of the major tumor suppressors is p53, a protein that acts in the cell nucleus to control the expression of other genes whose products can inhibit cell proliferation (increase in cell number) and cell growth (increase in cell size). Abnormal cell proliferation and growth are characteristics of cancer. Scientists previously knew which p53 target genes inhibit cell proliferation, but those required for inhibition of cell growth were unknown. http://www.physorg.com/news137335704.html Medicine & Health Thu, 07 Aug 2008 13:48:24 EST news137335704