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Azido and alkyne functions can cyclise by an intramolecular CuI or Cu0 catalyzed azide-alkyne 1,3-dipolar cycloaddition (CuAAC). This so-called Click Reaction, developed by K. Barry Sharpless and Morton Meldal, has meanwhile grown to a widely used type of reaction orthogonal to many other types of reactions in different kinds of applications.read more
Mutant or modified aminoacyl tRNA synthetases (aaRS) have been used to charge non-natural amino acids to the corresponding tRNA, which incorporates them into polypeptides or proteins during recombinant synthesis.read more
As Boc and Fmoc protected derivatives of both azido and alkyne amino acids are available, they can be introduced into peptide sequences through standard SPPS protocols, for example. In an α-helical secondary structure amino acids at positions i and i+4 are above each other.read more