By Stef J. Koppelman, Sue L. Hefle
Allergens pose a major danger to shoppers, making powerful detection equipment a concern for the meals undefined. Bringing jointly key specialists within the box, this significant assortment stories the diversity of analytical ideas on hand and their use in detecting particular allergens comparable to nuts, dairy and wheat items. the 1st a part of the ebook discusses demonstrated equipment of detection akin to using antibodies and ELISA options. half 2 studies thoughts for specific allergens. the ultimate a part of the ebook explores how detection tools should be so much successfully utilized and contains discussions on components that impact try out functionality and allergen research from a criminal viewpoint.
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46 Many 2S albumins possess high levels of sulfur-containing amino acid residues. Typical 2S albumins, such as the napins from the Brassicaceae or the Brazil nut 2S albumin, are heterodimeric proteins consisting of two polypeptide chains with molecular weights of about 4 and 9 kDa. 46 The major role of 2S albumins is as seed storage proteins for the developing seed. They appear to be stable to proteolysis and can bind lipids. 8 kDa Ara h 732 belong to the conglutin protein family that is related to the 2S albumin family of seed storage proteins.
20 Clinically relevant cross-reactivity between pea and peanut does occur. 21 Beta-conglycinin, a glycoprotein of 180 kDa, is a major soybean globulin that comprises about 50% of the 7S fraction. It forms trimers that are composed of three subunits, alpha, alpha′, and beta. 22 Beta-conglycinin is a heterogenous mixture of different molecular species resulting from the various combinations of the three subunits. 23 To date, several other 7S globulin family members have been identified as food allergens.
Prausnitz, C and Kustner, H (1921) ‘Studien uber die Ueberempfindlichkeit’, Centralbl fur Bakt, 86, 160–169. 24. Ishizaka, K, Ishizaka, T and Hornbrook, M M (1966) ‘Physico-chemical properties of reaginic antibody. V. Correlation of reaginic activity with gamma-E-globulin antibody’, J Immunol, 97, 840–853. 25. Ishizaka, K, Ishizaka, T and Hornbrook, M M (1966) ‘Physico-chemical properties of human reaginic antibody. IV. Presence of a unique immunoglobin as a carrier of reaginic activity’, J Immunol, 97, 75–85.