http://phys.org/ en-us Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. Researchers at the A*STAR Institute of Medical Biology (IMB) have discovered a critical checkpoint protein that controls when human embryonic stem cells (hESCs) begin to differentiate. http://phys.org/news281175750.html Biology Wed, 27 Feb 2013 09:10:03 EST news281175750 Vita Golubovskaya, PhD, and five colleagues from Roswell Park Cancer Institute (RPCI) have published basic research in the Journal of Biological Chemistry (JBC) about two proteins that are overexpressed, or produced in excessive amounts, in tumor cells. http://phys.org/news254727064.html Chemistry Fri, 27 Apr 2012 06:32:34 EST news254727064 Scientists have uncovered a vital link in the chain of events that gives stem cells their remarkable properties. http://phys.org/news169989830.html Biology Thu, 20 Aug 2009 12:40:01 EST news169989830