Leupeptin Ac-Leu-Leu-argininal x ½ H2SO4, synthetic

Formula: C₂₀H₃₈N₆O₄ x 1/2 H₂SO₄
Molecular weight: M_r = 475.6
Specificity: Inhibits serine and thiol proteases such as trypsin, plasmin, proteinase K, kallikrein, papain, thrombin, and cathepsin A and B. Not affected are α-, β-, γ-, and δ-chymotrypsins, pepsin, cathepsin D, elastase, renin, and thermolysin.
Suggested working concentration: 0.5 - 10 μg/ml (1 - 20 μM)
Solubility/Stability: Highly soluble in water (1 mg/ml). Stable for at least 1 week at +2 to +8°C and 6 months frozen in aliquots at -15 to -25°C.