• T9777
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Trypsin-chymotrypsin inhibitor from Glycine max (soybean)

lyophilized powder

Bowman-Birk Inhibitor
CAS Number:
MDL number:

biological source

Glycine max (soybean)

Quality Level


lyophilized powder


Protein, 70-90% biuret

storage temp.


General description

Trypsin-chymotrypsin inhibitor belongs to the family of plant protease inhibitors. It is mainly found in the legume (Fabaceae) and cereal (Poaceae) families. Trypsin-chymotrypsin inhibitor consists of many internal disulfide bonds between conserved Cys residues, which maintains structural stability and active conformation of the inhibitory loops. Trypsin-chymotrypsin has anticarcinogenic properties.
Highly cross-linked with seven disulfide bridges, Bowman-Birk inhibitor has spatially distinct domains for trypsin and chymotrypsin inhibition.


Bowman Birk protease inhibitor prevents radiation-induced carcinogenesis by a reduction of incorrect DNA repairs, resulting in a reduced amount of dicentric chromosomes.
Trypsin-chymotrypsin inhibitor from Glycine max (soybean) has been used for flow cytometric separase activity assay. It has also been used to inhibit trypsin and chymotrypsin for in vitro gastrointestinal (GI) digestion studies.


10 mg in glass bottle
25 mg in poly bottle
50, 100, 500 mg in glass bottle

Unit Definition

One trypsin unit = 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).

Physical form

Lyophilized powder containing phosphate buffer salts, pH 7.6

Analysis Note

1 mg protein will inhibit ≥0.5 mg trypsin with activity of ~10,000 BAEE units per mg protein or ≥1.0 mg chymotrypsin with activity of ~40 BTEE units per mg protein.

Other Notes

View more information on Trypsin Inhibitor.

Storage Class Code

13 - Non Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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Product Information Sheet

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