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Abstract: A novel antibody-polymer conjugation method termed open-sandwich molecular imprinting (OS-MIP) has been proposed to produce a specific recognition matrix in the presence of a target antigen. The resultant carboxymethyldextran matrix conjugated with two separate antibody variable region fragments imprinted with the cognate antigen showed higher antigen-binding capacity than non-imprinted ones and was successfully used to sensitively monitor multiple antigen binding/desorption events by a surface plasmon resonance biosensor. Furthermore, when each fragment was labeled with different fluorophores before conjugation, the fluorescence signals of the matrix made by OS-MIP clearly showed an antigen concentration dependent increase in Förster resonance energy transfer between the two dyes. By using a combination of various methods for detecting interaction, OS-MIP will be a useful platform for detecting various targets from small molecules to proteins with high sensitivity and specificity
Template and target information: protein, hen egg lysozyme, HEL