General description
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 terminate proteolysis reaction
- in OVO-1 solution to triturate the cell suspension for the dissociation of retina
- in phosphate buffered saline for dissociation of cortices
Biochem/physiol Actions
Ovomucoid possesses trypsin inhibitor activity. It has several conformational and linear epitopes that can be bound by immunoglobulin E (IgE). It is highly stable against heat and proteolysis.
Other Notes
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.
View more information on Trypsin Inhibitor.
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Danger
hcodes
Hazard Classifications
Resp. Sens. 1 - Skin Sens. 1
저장 등급
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
Meeyong Shin et al.
Allergy, asthma & immunology research, 5(1), 42-47 (2013-01-02)
It is known that ovomucoid, an egg allergen, is heat resistant and remains soluble after heating. However, a recent study showed that the antigenic activity of ovomucoid could be reduced by heating when egg white (EW) was mixed with wheat
ORF7 of Varicella-Zoster Virus Is Required for Viral Cytoplasmic Envelopment in Differentiated Neuronal Cells
Jiang HF, et al.
Journal of virology, 91(12) (2017)
Ovomucoid specific immunoglobulin E as a predictor of tolerance to cooked egg
Bartnikas LM, et al.
Allergy & rhinology (Providence, R.I.), 6(3), ar-2015 (2015)
Meeyong Shin et al.
Allergy, asthma & immunology research, 5(2), 96-101 (2013-03-02)
The present study was performed to determine the factor, either duration or the temperature of heat treatment, exerting maximal and significant influence on the composition and allergenicity of egg white (EW) proteins. Raw EW and 4 kinds of heated EW
Manipulation of the N-terminal sequence of the Borna disease virus X protein improves its mitochondrial targeting and neuroprotective potential
Ferree C, et al.
Faseb Journal (2015)
프로토콜
This technical article described the Enzymatic Assay of Trypsin Inhibitor.
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