Tau has been found to be phosphorylated at over 30 serine/threonine residues in the brains of patients with AD, and approximately one half of these are canonical sites for proline-directed protein kinases, including GSK-3β, cyclin-dependent kinase 5, and p38 mitogen-activated protein kinase (p38-MAPK) [18,19]. The gene discussed is GSK3B; the disease is Alzheimer disease.