Proteins that were identified in this apoptotic event when the A2780 ovarian cancer cells were treated with 9-methoxycanthin-6-one were Pyruvate kinase (PKM), annexin A2 (ANXA2), galectin 3 (LGAL3), heterogeneous nuclear ribonucleoprotein A1 (HNRNP1A1), peroxiredoxin 3 (PRDX3) and glyceraldehyde-3-phosphate dehydrogenase (GAPDH). This evidence concerns the gene PRDX3 and ovarian cancer.