The pentapeptide Thymopentin (TP5) is the fragment of thymopoietin II(32-36) with basic sequence H-Arg-Lys-Asp-Val-Tyr-OH. It has the same biological activity as the thymopoietin II, which has the double-direction immunities to our bodies.

• 以H-Arg-Lys-Asp-Val-Tyr-OH 为序列的胸腺五肽(TP5)是胸腺生成素II(Thymopoietin II)中第32~36 位的氨基酸残基片段,它保留了胸腺生成素II原有的生物活性,对机体的免疫系统具有双向调节作用,现已作为药物投放市场。