The IC50 for PTN after 48 h of exposure was reported to be 1.26 μg/mL for the Raji cell line (Epstein–Barr virus-positive lymphoma) [55], 2.1 μg/mL for SiHa (human cervical cancer) cells, and 2.4 μg/mL for MCF-7 cells. Here, PTN is linked to cervical cancer.