#$%^&*AU2012200520A120120223.pdf#####Abstract A DNA construct contains a fusion gene under the control of a promoter. The fusion gene comprises at least one resistance gene and at least one reporter gene and is slightly toxic to a host cell transfected with that DNA construct. That DNA construct can be encoded on a plasmid or a virus. Further, a method is described for using the DNA construct to identify substances that may cause a differentiation in eukaryotic cells.
