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Specifications

Soybean trypsin inhibitor (SBTI) first crystallized by Kunitz (1945) is one of several such inhibitors found in soybeans. A single Arginine-Isoleucine bond is cleaved by trypsin; a covalent bimolecular complex of inhibitor and trypsin results. On dissociation either virginal or modified inhibitor appears.
Catalog #	T8685
Activity	1mg inhibits 1.2 mg of trypsin
	(1mg trypsin 180 TAME units, 10,350 BAEE units, 3450 USP/NF units)
Unit Definition	One Unit hydrolyzes one umole of TAME/min. at 25ºC, pH 8.2, in the presence of 0.1M calcium.
A280@mg/ml	As reported
Storage and Stability	Lyophilized powder may be stored at 4°C. Stable for 6 months at 4°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
CAS Number	9035-81-8
Molecular Weight	21.5kD
Source	Soybean
Purity	Chromatographically purified ( 90%, verified by SDS-PAGE).
Form	Supplied as a lyophilized 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.