Simplified Tracking of a Soy Allergen in ProcessedFood Using a Monoclonal Antibody-Based Sandwich ELISA Targeting theSoybean 2S Albumin Gly m 8

Soybean allergens in food samples are currently detected in the most of cases using enzyme-linked immunosorbent assays (ELISAs) based on antibodies raised against bulk soybean proteins or specifically targeting soybean trypsin inhibitor, conglycinin or glycinin. The various commercial ELISAs lack standardized reference material, and the results are often inaccurate because the antibodies cross-react with proteins from other legumes. Furthermore, the isolation of allergenic proteins involves laborious denaturing extraction conditions. To tackle these challenges, we have developed a novel sandwich ELISA based on monoclonal antibodies raised against the soybean 2S albumin Gly m 8 and a recombinant Gly m 8 reference-protein with native-analogous characteristics. The antibodies do not cross-react with other legume proteins and the extraordinary stability and solubility of Gly m 8 allows it to be extracted even from complex matrices after processing. The Gly m 8 ELISA therefore achieves greater specificity and ...