For comparison, cells were also cultured in growth factor reduced Matrigel, a commercial BME composed of laminin, collagen IV and other basement membrane components extracted from mouse Engelbreth‐Holm‐Swarm sarcoma.[47] Matrigel has been reported to have G′ values in the range of 50–90 Pa, which is similar to the stiffness of the soft fibrin gel used in this work.[48, 49]. This evidence concerns the gene LAMB2 and sarcoma.