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. 2018 Sep 2;4(3):72. doi: 10.3390/gels4030072

Figure 2.

Figure 2

Strategies of disulfide bond formation for in situ crosslinking of polymer hydrogels. (A) Mild oxidation of thiols. (B) Thiol-disulfide exchange (a substitution reaction). The disulfide-crosslinked network can break down when treated with reductive agents (e.g., soluble thiols).