Alkyne Sphinganine a metabolic labeling reagent that contains a terminal alkyne moiety that allows for the subsequent tagging of protein−lipid complexes by click chemistry. The terminal alkyne group can be used in a highly specific linking reaction with azide-containing reagents, known as ‘click chemistry’, in the presence of a copper (Cu)-containing catalyst allowing for the visualization and proteomic profiling of protein−sphingolipid complexes in living cells.
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