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Abstract: Molecularly imprinted polymer brush layers and gel layers with both a lectin (ConA) and an antibody-IgG as biomolecular ligands for a target protein were formed on surface plasmon resonance (SPR) sensor chips via surface-initiated atom transfer radical polymerization (SIATRP) without and with a crosslinker, respectively. While the IgG-imprinted brush layers chip had almost the same affinity constant for target IgG as the nonimprinted brush layer chip, the affinity constant of the IgG-imprinted gel layer chip was approximately twice than that of the nonimprinted gel layer chip. These indicate that chemical crosslinks are very important factor to create distinct molecular recognition sites by molecular imprinting. Thus, biomolecular imprinting that uses biomolecular ligands and crosslinkers enables us to design polymer layer chips with distinct molecular recognition sites with a strong affinity for a target biomolecule. The molecularly imprinted gel layers chips with lectin and antibody ligands are promising candidates for fabricating SPR sensor systems to monitor target biomolecules such as proteins.
Template and target information: protein, conconavalin A, ConA, immunoglobulin G, IgG
Author keywords: surface plasmon resonance, molecular imprinting, SI-ATRP, hydrogel, lectin, antibody