PET scans showing protein synthesis in the brain

PET scans showing protein synthesis in the brain

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Credit: CNRI/SCIENCE PHOTO LIBRARY

Caption: Series of eight PET scans (positron emission tomography) of axial sections through a normal human brain, illustrating the gradual incorporation of a radioactive tracer in protein synthesis. The images were taken at intervals after the introduction of radioactive methionine (an amino-acid "building block" of proteins) into the circulation. The first image (top left) was taken 90 seconds after injecting the tracer & shows methionine (red areas on image) in the vascular spaces only (bottom); successive images show its presence developing in the cerebral cortex, extending to the inner white matter and illustrate the extent of active protein synthesis.

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Keywords: anatomy, brain scan, human body, in brain, nervous system, neuroimaging, pet scan, protein synthesis

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