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Contact: Barbara K. Kennedy
science@psu.edu
814-863-4682
Penn State
Caption: The dissected fly brain is stained for tyrosine hydroxylase immunoreactivity to visualize dopamine neurons. Tyrosine hydroxylase is a rate-limiting enzyme for dopamine biosynthesis and is present in dopamine neurons. Dopamine neurons comprise only about 0.1 percent of all the neurons in the fly brain.
Credit: Young-Cho Kim, Penn State
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