Scientists discover a certain type of protein in brain causes Alzheimer’s disease

Researchers have uncovered a new clue to the cause of Alzheimer’s disease. The brains of people with the memory- robbing form of dementia are cluttered with a plaque made up of beta-amyloid, a sticky protein. But there long has been a question whether this is a cause of the disease or a side effect. Also involved are tangles of a protein called tau; some scientists suspect this the cause.