PPP2R2A and posterior cortical atrophy: Importantly, inducible expression of B55α in PPP2R2A-wt human BJ fibroblasts (~2.6 fold, Fig. 3h) and PCa LNCaP cells (1.9 fold, data not shown) did not result in accumulation of cells in G2/M, indicating that PPP2R2A-wt cells are not as vulnerable to increases in the expression of B55α.