Using the tension-sensitive bacterial adhesin-derived peptide FnBPA5, which binds specifically to relaxed fibronectin, fibers were found to be distributed throughout the healthy heart in a tensed configuration as compared to that of the tumor stroma, which was more heterogeneous and exhibited an abundance of relaxed fibronectin (Fonta et al. 2020). The gene discussed is FN1; the disease is neoplasm.