FN1 and breast cancer: We have previously reported that FN‐silk networks can be successfully used to culture a wide array of cell types including for example, pluripotent stem cells (Åstrand et al. 2020; Fiorenzano et al. 2021), MSC (Johansson et al. 2019), breast cancer cell lines, and primary breast cancer tumor cells (Collodet et al. 2023).