β-Gal Staining Kit (Invitrogen™)

The β-Gal Staining Kit allows you to determine the percentage of transfected cells expressing lacZ. lacZ is a bacterial gene often used as a reporter construct in eukaryotic transfection experiments. The gene product of lacZ, β-galactosidase, is resistant to proteolysis in cellular lysates and its activity is easily assayed. β-galactosidase catalyzes the hydrolysis of X-gal, producing a blue color that can be easily visualized under a microscope.