FIGURE 6.
Enzymatic catalytic reactions for covalent crosslinking. (A) The chemical structure of HA‐Tyr. (B) The principle diagram of the reaction catalyzed by horseradish peroxidase. (C) The optical image of hydrogel in vitro. (D) The crosslinking performance of HA‐Tyr in vivo. (A–D) Reproduced with permission. 73 Copyright 2010, Royal Society of Chemistry. (E) Chemical structure of hematin and its catalytic performance for crosslinking. Reproduced with permission. 74 Copyright 2010, American Chemical Society.