Different prions affect different regions of the brain
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Mutations can result in different shapes of the prion protein that accumulates in different regions of the brain: In familial insomnia (FFI), mutated prions (violet squares) accumulate in the thalamus, with the result that the patients are unable to sleep. In Creutzfeldt-Jakob disease, the prion protein accumulates primarily in the cerebral cortex (red dots and area).
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