Leupeptin Hemisulfate is a protease inhibitor commonly used in laboratory research to inhibit serine and cysteine proteases, including trypsin and papain. This powerful inhibitor is essential in enzyme inhibition experiments where the proteolytic degradation of proteins needs to be controlled. The 1-gram vial provides a high-concentration reagent that can be diluted to required working strengths for various applications in protein research, cell biology, and molecular biology. Leupeptin is widely used to prevent protease activity in tissue extracts, cell cultures, and protein isolation, ensuring the stability of proteins during analysis.