Description_x000D_ Application_x000D_ β-glucuronidase is used as a reporter gene in GUS assays to monitor gene expression._x000D_ Packaging_x000D_ 500000, 1000000, 5000000 units in poly bottle_x000D_ Biochem/physiol Actions_x000D_ β-glucuronidase catalyzes the breakdown of complex carbohydrates. In humans it converts conjugated bilirubin into the unconjugated form, making bilirubin suitable for reabsorption._x000D_ Unit Definition_x000D_ One Sigma or modified Fishman unit will liberate 1.0 μg of phenolphthalein from phenolphthalein glucuronide per hr at 37 °C at pH 5.0 (30 min assay).