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Analysis Affinity of mAb III/V with PNGase F-Deglycosylated Pfs48F1 by KinExA (CAT#: STEM-MB-0041-CJ)

Introduction

N-linked glycosylation is a post-translational modification which is critical for correct folding, stability and biological activity of many proteins including recombinant subunit vaccines and therapeutic proteins produced in heterologous expression systems. Some eukaryotic (as well as bacterial) proteins may not contain N-glycans in the native host, but their proteins may contain multiple potential glycosylation sites that are aberrantly glycosylated when these proteins are expressed in heterologous eukaryotic expression systems, potentially leading to imp+I91aired functional activity. A bacterial PNGase F (Peptide: N-glycosidase F) in combination with a target protein of interest. PNGase F is a 34.8-kDa enzyme secreted by a Gram-negative bacterium Flavobacterium meningosepticum. It cleaves a bond between the innermost GlcNAc and asparagine residues of high-mannose, hybrid and complex oligosaccharides in N-linked glycop.The study showed that the malaria vaccine candidate Pfs48F1 produced by in vivo deglycation plants was significantly stronger than the glycation form of Pfs48F1 produced by plants, using monoclonal antibodies I, III, and V cultured against various epitopes (I, III, and V) native to Plasmodium falciparum.




Principle

KinExA is a two-stage analysis system. In the first stage, a number of solutions are prepared, where one partner remains constant (constant binding partner, or CBP) and the other (titrant) is variable, usually serially diluted. As the titrant is added, the free CBP decreases and is analysed by a sophisticated and precise microfluorescence measurement device. The signal generated can be mathematically related to the affinity (KD) of the two molecules for each other, as well as the kinetic parameters of binding (kon) and dissociation (koff).

Applications

Immunology/Inflammation, Toxicology

Procedure

1. preparation of the functionalized beads which will capture the analyte for measuremen.
2. preparation of a series of solutions consisting of a constant initial concentration of one component of the binary reaction and serial dilutions of the other reactant. The component that is kept constant is the constant binding partner (CBP) , and is the one which will be analyzed.
3. each reaction mixture is sampled and the fluorescence of free CBP bound to the capture beads is obtained for subsequent numerical analysis.

Materials

• Sample Type: Antibodies, Cells, Small Molecules, Proteins, DNA, Lipids, Viruses, Serum, & More
• Equipment: Kinetic Exclusion Assay (KinExA)