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Photocleavage reactions of a) nitrobenzyl and b) coumarin photolabile linkages. When incorporated into the structure of the network, these cleavage reactions result in network degradation. c) Schematic showing the use of a photodegradable hydrogel to vascularize a cell-laden hydrogel construct in situ. Reprinted from Arakawa et al.193 copyright (2017) Wiley.
