THPTA (tris-hydroxypropyltriazolylmethylamine) is a water-soluble, very effective accelerating ligand for copper-catalyzed Alkyne-Azide click chemistry reactions (CuAAC). In addition to greatly enhancing the rate of CuAAC, THPTA minimizes perturbations to the physiological state of the cells or organisms probed and allows for the effective bioconjugation with suppressed cell cytotoxicity by further lowering Cu loading in the catalyst formulation. The water-soluble THPTA ligand further simplifies click chemistry by allowing the entire reaction to be run in water.
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