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Has arginine been overlooked as a target for bioconjugation on antibodies?

A team of researchers from iNANO and Department of Chemistry have synthesized a molecule containing diketopinic acid and an azide handle which allows for chemo-selective bioconjugation to arginine. This novel conjugation method offers precise and stable bioconjugation to proteins, enhancing the potential for various biomedical applications.

Illustration of the concept of the DKPA-based compound. A free arginine residue on the surface of the antibody can react with the compound to install an azide. This can be further functionalized using a DBCO reagent, with a tag of interest.