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Considering the fact that site‐selective late‐stage diversification of peptides and proteins remains a challenge for biochemistry, strategies targeting low‐abundance natural amino acids need to be further developed. As an extremely oxidation‐sensitive and low‐abundance amino acid, methionine emerges as a promising target for chemo‐ and site‐selective modification. Herein we report an efficient and...
Chemical protein modifications facilitate the investigation of natural posttranslational protein modifications and allow the design of proteins with new functions. Proteins can be modified at a late stage on amino acid side chains by chemical methods. The indole moiety of tryptophan residues is an emerging target of such chemical modification strategies because of its unique reactivity and low abundance...
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