Danton H. O'Day is a Full Professor Emeritus in the Department of Biology at the University of Toronto Mississauga, Canada, with a cross-appointment to Cell and Systems Biology at the University of Toronto. His early work on the social amoeba Dictyostelium led to studies on the biomedical functions of the primary calcium-binding protein Calmodulin. In 2004, he and Dr. Michael A. Myre proposed the Calmodulin Hypothesis of Alzheimer’s disease which has since been validated by multiple peer-reviewed articles and has also been shown to apply to other neurodegenerative diseases.