Figure 1 (IMAGE)

Science China Press

Figure 1

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(A) Structures of building blocks for hydrogel formation: 4aPEG end-capped with OPA or N-nucleophiles (amine, hydrazide, or aminooxy). (B) Schematic representation of formation of hydrogel from materials in A. (C) Putative mechanism of the linkage formation between OPA and various N-nucleophiles.

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