CDK1 and salivary gland adenoid cystic carcinoma: Even in high metastatic cell lines, such as salivary gland adenoid cystic carcinoma, sulforaphane induces G2-M arrest and apoptosis with a marked decline in protein levels of G(2)/M regulatory proteins including cyclin B1 and cyclin-dependent kinase 1 (CDK1) along with increased expression of Bax and down-regulation of Bcl-2 proteins [57].