TLK1 and posterior cortical atrophy: We reported the presence of TLK1 and MK5 phosphoprotein (pMK5‐S354) in all major androgen‐dependent and androgen‐independent PCa cell lines and demonstrated that antiandrogen (bicalutamide) treatment increases the pMK5‐S354 level in a dose‐dependent fashion (Fig. 3A,B,D and E).