To further validate the biological effect of LGRFYAASG-pen, we performed adhesion assays with KS1767 human Kaposi’s sarcoma, KRIB human osteosarcoma, B16F10 murine melanoma and Lewis lung mouse carcinoma (LLC) cell lines on fibronectin- or vitronectin-coated wells. The gene discussed is FN1; the disease is osteosarcoma.