Scientists get a glimpse of chemical tagging in live brains

PET scan

LEAVING A MARK A new radioactive tracer molecule shows where chemical tags, called epigenetic marks, are made in the brains of healthy people. Shown is the epigenetic activity in a volunteer’s brain imaged 60 to 90 minutes after injection of the tracer. 

H.-Y. Wey et al./Science Translational Medicine 2016

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