A proprietary formulation prepared in a 50 mM Tris pH8.0 buffer and designed for gentle disruption of cell membrane to extract proteins. It provides a simple, rapid, low cost method for releasing expressed target protein for preparation, purification, or other applications. The EZLys™ reagent is an optically transparent, non-denaturing formulation which can be easily removed by dialysis. It is also useful for the preparation of high purity inclusion bodies for subsequent purification. This reagent does not interfere with cross linking and is suitable for use in the BCA or Bradford protein assays. Ideal pH range is pH 5 -10. The 100 ml and 500 ml reagent are sufficient for protein extraction from 25 g and 125 g of cell paste.