RGD peptide (GRGDNP) (TFA) is an inhibitor peptide with 6 amino acids in its sequence. RGD peptide (GRGDNP) (TFA), as an inhibitor of integrin-ligand interaction, plays an important role in cell adhesion, migration, growth and differentiation. In vivo, RGD peptide (GRGDNP) (TFA) can promote cell apoptosis by activating conformational changes, thereby enhancing the activation of caspase-3.