stem cells (IMAGE) Penn State Caption Penn State researchers tested various concentrations of inexpensive, easy-to-store small molecules (CH) to coax stem cells into more mature cells. Tagged with red (mCherry), the cells died in higher concentrations over time Credit Xiaojun "Lance" Lian, Penn State Usage Restrictions non commercial use only License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.