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Synthesis of porcine Gelatin-methacryloyl (GelMa) and fabrication of a photo-crosslinked GelMa hydrogel. (A) Gelatin was reacted with methacrylic anhydride (Ma) to introduce a methacryloyl substitution group on the reactive amine and hydroxyl groups of the amino acid residues. GelMa photo-crosslinking to form a hydrogel matrix under UV irradiation. (B) 1H NMR spectra of unmodified gelatin and GelMa.
