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T1021 Sigma

Trypsin inhibitor from Glycine max (soybean)

Isoelectric focusing marker, pI 4.6

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Synonym: SBTI

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Description

Preparation Note

Trypsin inhibitor is soluble in water and phosphate buffers at concentrations of 10 mg/ml or higher. Solutions at higher concentrations may be hazy and have a yellow to amber color.

Biochem/physiol Actions

Soybean trypsin inhibitor inhibits trypsin and to a lesser extent chymotrypsin and plasmin. It forms a 1:1 stoichiometric complex with trypsin. Upon formation of this complex, trypsin may cleave a single arginine-isoleucine bond in the inhibitor. Dissociation of this complex may yield the modified form or the native inhibitor. At the optimal pH for trypsin binding (pH 8.0), the association constant is ≥ 10x108.

General description

Soybean trypsin inhibitor exhibits a high degree of sequence homology with cathepsin D inhibitor from potatoes.1

Price and Availability

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