X-Gal substrate is metabolized by the b-galactosidase enzyme into an insoluble blue precipitate. It is ideal for staining transformed bacteria and LacZ transfected or infected cells, tissues and organisms. The quality and purity of the X-Gal substrate is essential to obtain high-quality and reliable results. *High Purity > 99%. Molecular biology grade *Great sensitivity *Perfect for cells, tissues and organisms staining Size: X-Gal is provided at 1g per vial. This product is also available in larger quantities (2g, 5g, 10g,...). Please contact us for a quote.