Post-bioprinting, neuroblastoma (Fig. 2Ai), Ewing sarcoma (Fig. 2Bi) and osteosarcoma (Fig. 2Ci) cells in the tripeptide hydrogel (FN + CN + LN) exhibited similar growth dynamics, characterised by consistent proliferative activity up to day 14. Here, FN1 is linked to Ewing sarcoma.