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T9253

Sigma-Aldrich

Trypsin inhibitor

powder

Synonym(s):

Ovomucoid

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About This Item

CAS Number:
9035-81-8
EC Number:
232-906-9
MDL number:
MFCD00082102
UNSPSC Code:
12352202
NACRES:
NA.77

product name

Trypsin inhibitor from chicken egg white, Type II-O, Partially purified ovomucoid, containing ovoinhibitor

biological source

chicken egg white

type

Type II-O

form

powder

mol wt

14 kDa

solubility

water: soluble 10 g/L

storage temp.

2-8°C

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General description

25% of ovomucoid comprises carbohydrate.
Ovomucoid or trypsin inhibitor is an abundant protein in most avian egg whites. The hen′s egg protein is composed of about 186 amino acid residues, and is highly glycosylated. Three tandem domains are each homologous with pancreatic trypsin inhibitor. It is highly immunogenic, and probably accounts for most cases of egg allergy.

Application

Trypsin inhibitor from chicken egg white has been used:
  • to produce denatured, oxidized and deglycosylated ovomucoid and used to stimulate patient derived cell cultures for mapping T cell epitopes
  • to treat nuclei for flow cytometric analysis
  • in Holtfreter′s solution, used for the dissociation of planarians into cells

Unit Definition

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.

Analysis Note

One mg will inhibit 0.8-1.6 mg of tryspin with activity of approx. 10,000 BAEE units per mg protein. May inhibit ≤0.3 mg of chymotrypsin with activity of approx. 40 BTEE units per mg protein.

Other Notes

Ovomucoid, from chicken egg white, does not itself inhibit chymotrypsin. Chymotrypsin inhibition is a measure of ovoinhibitor contamination by method of Feeney, R. E., et al., J. Biol. Chem., 238, 1415 (1963).
View more information on Trypsin Inhibitor.

Pictograms

Health hazard
GHS08

Signal Word

Danger

Hazard Statements

H317,H334

Hazard Classifications

Resp. Sens. 1 - Skin Sens. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Novel B and T cell epitopes of chicken ovomucoid (Gal d 1) induce T cell secretion of IL-6, IL-13, and IFN-gamma
Holen E, et al.
Clinical and Experimental Allergy, 31(6), 952-964 (2001)
Expression of cyclin E in placentas with hydropic change and gestational trophoblastic diseases: implications for the malignant transformation of trophoblasts
Kim YT, et al.
Cancer, 89(3), 673-679 (2000)
Yihao Jiang et al.
eLife, 9 (2020-12-05)
Physiological response to thermal stimuli in mammals is mediated by a structurally diverse class of ion channels, many of which exhibit polymodal behavior. To probe the diversity of biophysical mechanisms of temperature-sensitivity, we characterized the temperature-dependent activation of MthK, a
Cultivation and characterization of planarian neuronal cells isolated by fluorescence activated cell sorting (FACS)
Asami M, et al.
Zoological Science, 19(11), 1257-1266 (2002)
Laura E Mickelsen et al.
eLife, 9 (2020-10-30)
The ventral posterior hypothalamus (VPH) is an anatomically complex brain region implicated in arousal, reproduction, energy balance, and memory processing. However, neuronal cell type diversity within the VPH is poorly understood, an impediment to deconstructing the roles of distinct VPH
View All Related Papers

Articles

Chymotrypsin

Analytical Enzyme Chymotrypsin: Chymotrypsin is produced in the acinar cells of the pancreas as the inactive precursor, chymotrypsinogen.

Protocols

Enzymatic Assay of Trypsin Inhibitor

This technical article described the Enzymatic Assay of Trypsin Inhibitor.

Chromatograms

application for HPLC

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