Inspired by the merits of self-assembled peptides, Fan et al. designed a transformable peptide, BP-KLVFF-SWTLYTPSGQSK (BFS), that can form peptide networks in situ precisely targeting to N-cadherin and high-efficiently blocking the N-cadherin as “a biomimetic antibody” to thereby, inhibit the migration of cancer cells in the end [67] (Figure 3). This evidence concerns the gene CDH2 and cancer.