Several proteins—such as RAt Sarcoma vírus (Ras) protein, Jun N-terminal kinase (JNK)-2, Activator protein 1 (AP-1), Nuclear Factor-kappaB (NFkB), protein kinase C (PKC), caspase, thioredoxin and tumour protein 53 (p53) [10,100]—which are known to have important roles in ovarian cancer [101,102,103,104,105,106,107,108,109,110,111,112], are regulated by thiol oxidation [100]. The gene discussed is TP53; the disease is ovarian cancer.