Based on our prior work [17] in which Meso64TR3, produced in HEK293T cells, caused very strong cytotoxicities in MUC16-expressing cancer cells (ovarian and pancreatic cancer), we tested whether Meso64TR3 produced from CHO-CAR cells retained its targeted bioactivity on MUC16-positive ovarian cancer cells OVCAR3. This evidence concerns the gene MUC16 and ovarian cancer.