CREB1 and scrapie: CaMK4β, CREB, p38γ, RSK1, and PSD-95 levels in the brainstem-cerebellum of scrapie-infected mice were different from those in mock-infected mice (nonlinear regression analysis; CaMK4β, P = 0.0404; CREB, P = 0.0372; p38γ, P = 0.0369; RSK1, P = 0.0471; PSD-95, P = 0.0147) (Figure 5).