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Specifications

Catalog #	P3280
Pepstatin A is used as a protease inhibitor. Pepstatin forming a 1	1 complex with the carboxylproteases (acid proteases) bovine chymosin, cathepsin D, pepsin, protease B and renin.
Amino acid sequence	H-Iso-Valeryl-Val-Val-Statine-Ala-4-Statine (Statine: 4-Amino-3-hydroxy-6-methyl heptanoic acid)
Activity (pepsin/casein, pH 2, 37°C)	~850ug/mg
Working Concentration	0.5-1ug/ml
Melting Point	As Reported
Solubility	Soluble in either DMSO or ethanol:glacial acetic acid (9:1) at 1mg/ml. Aqueous buffer at slightly alkaline pH is recommended for dilution of the reconstituted protein in either the above organic solvents. Note: Insoluble in dH2O and other aqueous buffer at near neutral pH. If water or acidic buffer is used for diluion, Pepstain A may precipitate from the soluion.
Storage and Stability	Lyophilized powder may be stored desiccated at -20°C. Aliquot and store at -20°C after reconstitution. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
CAS Number	26305-03-3
Molecular Formula	C34H63N5O9
Molecular Weight	685.9
Purity	~90%
Form	White powder
Important Note	This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
Alternate names	Microbial