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Schematic diagram illustrating the hyaluronic acid-based hybrid bio-ink. A Representations of hybrid bio-ink formation. Bio-ink A: acrylated hyaluronic acid for immobilizing bioactive peptide. Bio-ink B: tyramine-conjugated hyaluronic acids for fast gelation. L929 cells or hMSC suspension was mixed with a Bio-ink A and Bio-ink B solution with peptides (1 × 106 cells/100 µl gel). B Overview of 3D culture and patterning process of hybrid bio-ink
