PTEN and cancer: A number of S-nitrosylated proteins were extensively investigated in cancer cells, such as B-cell lymphoma-2 (Bcl-2)20, Ras21, Fas22, mitogen-activated protein kinase phosphatase-1 (MKP-1)23, tumor necrosis factor receptor associated protein 1 (TRAP1)24 and Phosphatase and tensin homolog (PTEN)25.