Tau protein, the main component of paired helical filaments

In this volume we commemorate the centennial of Alois Alzheimer's discovery of what was later known as Alzheimer's disease, named by Alzheimer's mentor, Emil Kraepelin [1]. In a much more low level, our group remember in this issue a paper published twenty years ago. In that paper it was described that tau can self-polymerize and, at that time, it suggested that tau was not only a component of Alzheimer paired helical filaments, as indicated some months earlier during that year, 1986, but that it was the main component of Alzheimer paired helical filaments.