Research performed in the laboratory of Professor Martin Yarmush on the use of transient transfection techniques for purifying differentiated cells derived from stem cells is spotlighted in the December 1 issue of Biotechnology and Bioengineering and singled out as the "Editor's Choice". Lead author on the work is BME graduate student Eric Wallenstein, with contributions from BME graduate student Jeff Barminko and ProfessorRene Schloss. The full paper describing this innovative work can be found in Biotechnol Bioeng, 2008; 101, 859-872.