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Key Documents

T9008

Sigma-Aldrich

Trypsin inhibitor from Glycine max (soybean)

1% solution in water (contains no buffers)

Synonym(s):

SBTI

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About This Item

CAS Number:
MDL number:
UNSPSC Code:
12352202

biological source

Glycine max (soybean)

sterility

sterile-filtered

form

solution

mol wt

20,100 Da

technique(s)

inhibition assay: suitable

solubility

balanced salt solution: 1 mg/mL
concentrate: >10 mg/mL, hazy, amber-yellow
phosphate buffer: 10 mg/mL
water: 10 mg/mL
serum-free medium: soluble

shipped in

ambient

storage temp.

2-8°C

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Biochem/physiol Actions

This inhibitor acts against trypsin, and chymotrypsin and plasmin to a lesser extent. It will also inhibit proteases with mechanisms similar to trypsin, plasma kallikrein and coagulation Factor X. The trypsin inhibitor will not act against metalloproteases, tissue-baseed kallikrein, acid proteases, or thio proteases. This inhibitor acts by forming a 1:1 stoichiometric complex with the protease active site, and then cleaving a single arginine-isoleucine bond on the inhibitor. The inhibition is both reversible and pH dependent.

Unit Definition

One trypsin unit = A253 of 0.001 per minute with N-alpha-benzoyl-L-arginine ethyl ester (BAEE) as substrate at pH 7.6 at 25 °C.
One trypsin unit will produce a ΔA253 of 0.001 per min with BAEE as substrate at pH 7.6 at 25 °C; reaction volume 3.2 mL, 1 cm light path.

Preparation Note

Prepared From Type I-S
The trypsin inhibitor is soluble in water and phosphate buffers at 10 mg/mL. It is soluble in balanced salt solutions at 1 mg/mL and in serum-free media. Concentrated solutions greater than 10 mg/mL may be hazy and have a yellow to amber color. After trypsinizing cells, resuspend in 1 mL trypsin inhibitor solution at 1 mg/mL for every mL of trypsin solution used for dissociation. The cell suspension should then be centrifuged at 1000 rpm, forming a cell pellet.

Solutions can retain activity when stored short-term at 2-8° C. Solutions are stable in frozen aliquots at -20°C.

Analysis Note

Protein determined by biuret. One mg of trypsin inhibitor will inhibit 1.0-2.5 mg of trypsin of ~10000 BAEE units/mg trypsin.

Other Notes

View more information on Trypsin Inhibitor.

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Hazard Classifications

Resp. Sens. 1 - Skin Sens. 1

Storage Class Code

12 - Non Combustible Liquids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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