Yes According to the inquiry of official website of Hefei Guotai Biotechnology Co., Ltd., on the basis of polypeptide, the design of targeting skin segment and amphiphilic self-assembled skin can improve the stability and targeting of anti-tumor polybrain, thus affecting the activity of polypeptide. A compound formed by dehydration and condensation of two amino acid molecules is called dipeptide, and a peptide composed of three or more amino acid molecules is called polypeptide.