Rapamycin, another antifungal drug extracted from Streptomyces hygroscopicus, is currently considered as a potent immunosuppressant in clinical and a target for mTOR, a serine/threonine protein kinase (Sabatini, 2017), exerting cytotoxicity against various kinds of cancers (Jelonek et al., 2021). The gene discussed is AKT1; the disease is cancer.