Developed by scientists at Cytoskeleton, the Advanced Protein Assay (Cat. # ADV01) and the Precision Red Advanced Protein Assay (cat. # ADV02) are highly recommended for measuring purified protein and total cell protein alike. The advantages of ADV01 are the low detection limit (0.25 µg protein/ml sample) and the highly similar readings between the same amounts of different purified proteins. ADV02 is less sensitive but more compatible with detergents, and retains the same similarity between different purified proteins. In comparison to the Bradford assay these assays read different purified proteins with two fold greater accuracy which allows the user to rely on the simple A = Ecl formula to convert the OD into a real protein concentration.