The current issue of Nature Biotechnology includes a paper by scientists at the Institute for Regenerative Medicine at Wake Forest who discovered another possible source for stem cells: placenta and amniotic fluid. The researchers published their findings and describe the amniotic fluid-derived stem cells as somewhere between embryonic and adult stems cells in development.
In another paper, researchers at the University of Texas at Austin have reported a method for large-scale absolute protein expression measurements. The method was used to estimate the relative contributions of transcriptional and translational-level gene regulation in the yeast and E. coli proteomes.
Last but not least, a paper from William Poueymirou of Regeneron Pharmaceuticals and colleagues presents an approach using genetically modified stem cells to rapidly generate mutant mice for the exploration of gene function.