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(a) Static and dynamic crosslinking generating the Alg-Tyr-3APBA-Gel hydrogel. Tyramine and 3APBA randomly attach to the carboxylic acid group of mannuronic or guluronic residues (respectively, green and orange diamonds represent D-mannuronic and L-guluronic residues). (b) Static Alg-Tyr-Gel hydrogels.
