Small T Antigen is a protein encoded by the SV40 virus that plays a crucial role in regulating cell growth and proliferation. However, if we look at the antonyms of Small T Antigen, we can explore the opposite direction of cell growth and proliferation, mainly the inhibition, and suppression of tumor development. Some of the antonyms of Small T Antigen may include Tumor suppressor genes like p53, PTEN, p16INK4a, and RB, which regulate cell division and prevent uncontrolled cell growth. Additionally, some therapy techniques like chemotherapy, radiation, and immunotherapy work to shrink tumors and prevent their growth. In conclusion, the antonyms of Small T Antigen effectively reverse its effects, resulting in tumor suppression, which can help in diagnosing, treating, and preventing cancer.