Recommended for use with tissue and cell extracts, including extracts containing detergents. A specially formulated cocktail of three phosphatase inhibitors that will inhibit alkaline phosphatases and serine/threonine protein phosphatases such as PP1 and PP2A. Each vial contains 2.5 mM (-)-p-bromotetramisole oxalate, 500μM cantharidin and 500 nM microcystin-LR.