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A schematic of the hydrogel precursors and the encapsulation of human mesenchymal stem cells (hMSCs) in a MMP7-sensitive cartilage mimetic hydrogel. Hydrogel precursors included 8-arm PEG functionalized with norbornene, MMP7-sensitive peptide flanked with cysteines on each end, thiolated chondroitin sulfate, and cysteine containing RGD sequence.
