Because cancer cells are highly proliferative compared to the other class in the human body, it is crucial to stop mitosis from happening. The folic acid antagonists that were tested were probably the most important discovery because the antifolates are highly potent against a vast array of solid tumors, including several types of leukemia, Hodgkin's disease, lymphosarcoma, melanoma, breast cancer, and prostate cancer. Methotrexate is still one of the main chemotherapy drugs used today to treat many types of cancer, and it has been a basis for all modern chemotherapy.[8]