Among all of the peptides, the Krpep‐2d peptide inhibited the proliferation of cancer cells and the downstream signal of K‐Ras.[41]Figure 15 shows the binding abilities of polypeptides to K‐Ras proteins measured by surface plasma‐resonance (SPR), which illustrates the overlapping binding sites of SOS1 and Krpep‐2 proteins on K‐Ras (G12D).[42]. This evidence concerns the gene KRAS and cancer.