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. Researchers from the California Institute of Technology (Caltech) have been able to view in detail, and for the first time, the previously mysterious process by which long chains of a protein called ubiquitin are added by enzymes called ubiquitin ligases to proteins that control the cell cycle. Ubiquitin chains tag target proteins for destruction by protein-degrading complexes in the cell. http://www.physorg.com/news178983771.html Biology Wed, 02 Dec 2009 13:43:50 EST news178983771 Researchers at UAB in collaboration with the University of Stellenbosch, South Africa, have discovered the structure of the PPC descarboxilase (PPCDC) enzyme present in the yeast Saccharomyces cerevisiae, a very important organism in biotechnology and an excellent model for biological research. Scientists have verified that its structure differs substantially from that found in humans, which in addition to its characteristic as an essential enzyme makes it a potential therapeutic target. http://www.physorg.com/news176567951.html Chemistry Wed, 04 Nov 2009 14:39:43 EST news176567951 (PhysOrg.com) -- A gene with a significant effect on regulating hemoglobin in the body has been identified as part of a genome-wide association study, which looked at the link between genes and hemoglobin level in 16,000 people. The research was carried out by scientists from Imperial College London and published in Nature Genetics today. It shows a strong association between a gene known as TMPRSS6 and the regulation of hemoglobin. http://www.physorg.com/news174490051.html Medicine & Health Sun, 11 Oct 2009 14:28:41 EST news174490051 Research carried out at the Hebrew University of Jerusalem has resulted in a promising approach to help treat Alzheimer's disease in a significant proportion of the population that suffers from a particularly rapid development of this disease. http://www.physorg.com/news167319118.html Chemistry Mon, 20 Jul 2009 14:32:55 EST news167319118 Viruses are molecular marauders, plundering cells for the resources they need to multiply. Of central importance for viruses is the ability to commandeer cellular gene expression machinery. Several human herpesviruses put the breaks on normal cellular gene expression to divert the associated enzymes and resources towards their own viral genes. Kaposi's sarcoma-associated herpesvirus (KSHV), which causes several AIDS-associated cancers, has now been shown to do this in an unexpected way, using a process that is normally protective, called polyadenylation. http://www.physorg.com/news162625056.html Biology Wed, 27 May 2009 06:38:19 EST news162625056 (PhysOrg.com) -- UC Irvine researchers have discovered that circadian rhythms - our own body clock - regulate energy levels in cells. The findings have far-reaching implications, from providing greater insights into the bond between the body's day-night patterns and metabolism to creating new ways to treat cancer, diabetes, obesity and a host of related diseases. http://www.physorg.com/news156087705.html Biology Thu, 12 Mar 2009 14:42:18 EST news156087705 Johns Hopkins and other researchers report what is believed to be the first direct evidence in lab animals that the erectile dysfunction drug sildenafil amplifies the effects of a heart-protective protein. http://www.physorg.com/news150398115.html Medicine & Health Mon, 05 Jan 2009 17:15:15 EST news150398115 A team of scientists from Queen`s University has discovered the first ever three-dimensional structure of a protein family that may help in developing more effective antibiotics. http://www.physorg.com/news133621805.html Medicine & Health Wed, 25 Jun 2008 14:10:05 EST news133621805