The bioactive pentapeptide thymopentin (TP5), with the chemical formula Arg-Lys-Asp-Val-Tyr and a molecular weight of 679.77, exhibits excellent water solubility and possesses notable biological properties, including its ability to facilitate CD4+ and CD8+ subsets differentiation and maturation [10,11,12], which have been used for treating immunodeficiency diseases including cancer, etc. [13,14]. The gene discussed is TMPO; the disease is cancer.