A beacon illuminates a key Alzheimer’s protein
Researchers can now see tau, which accompanies amyloid in diseased brains
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2013/09/ls_Image2_0.jpg?fit=860%2C460&ssl=1)
BEACON OF TAU In a PET scan, the protein tau is illuminated (left) in the hippocampus (arrowhead) of a brain of a person suspected to have Alzheimer's disease. A scan that reveals amyloid (right) shows a slightly different pattern.
M. Maruyama et al/Neuron 2013