Gelatin methacrylate (GelMA) is a gelatin-based bioink that provides mammalian cells with the essential properties of their native microenvironment. GelMA is modified with methacryloyl groups to be reticularized with a photoiniciator exposed to ultraviolet light. It is based on gelatin derived from natural collagen that has been modified with photopolymerizable functional groups that allow hydrogel crosslinking after printing.

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