A graph displays three groups of four squares

A graph displays three groups of four squares

A graph displays three groups of four squares, which are various concentrations of red and black.

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. 

IMAGE: Xiaojun "Lance" Lian/Penn State