This is a collaborative study between investigators from the University of Pittsburgh (Pitt) and Washington University (WashU) to delineate the genetic architecture of Alzheimer’s disease (AD) and AD-related proteinopathies. The participants are from a number of genetic studies being carried out on AD and AD-related dementias and non-AD subjects from 1) the Pitt-ADRC and ancillary studies and 2) Knight-ADRC Memory and Aging Project (MAP) study. The study samples are comprised of approximately 90% whites, 10% blacks, and 50% females with a mean age of 77.7 years.