Fig. 1From: Non-canonical amino acid labeling in proteomics and biotechnologyAzide-alkyne cycloaddition reactions. a Copper(I)-catalyzed [3 + 2] azide-alkyne cycloaddition (CuAAC). b [3 + 2] cycloaddition of azides and strain-promoted alkynes (cyclooctynes) (SPAAC)Back to article page