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The galactose/glucose-binding protein (GBP) is synthesized in the cytoplasm of Escherichia coli in a precursor form and exported into the periplasmic space upon cleavage of a 23-amino-acid leader sequence. GBP binds galactose and glucose in a highly specific manner. The ligand induces a hinge motion in GBP and the resultant protein conformational change constitutes the basis of the sensing system...
We report the development of a competitive heterogeneous immunoassay for BSA-conjugated Salmonella antigen using a fusion protein between an anti-Salmonella single-chain antibody (scFv) and the photo-protein aequorin (AEQ). It has been demonstrated that the fusion protein (scFvLAEQ) maintains both the antibody binding affinity toward the Salmonella antigen as well as the luminescence properties of...
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