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Schematic illustration of a phosphatase/kinase-switch-regulated self-assembly/disassembly of supramolecular hydrogel composed of nanofibers. Upper: Phosphorylation of the hydrogelator 1 under the action of ATP and kinase yields 2 and induces a gel-solution phase transition. Dephosphorylation of 2 under the action of phosphatase generates 1 and launches the self-assembling of 1 into nanofibers and the formation of hydrogels. Lower: Chemical structures of 1 and 2.
