![](http://www.alamy.com/thumbs/6/CA40C87C-3FE9-4AEF-A67B-4517BAFE1192/2JKFTFB.jpg)
Microscopic image of mitochondria in a single heart cell. Mitochondria highlighted in red were exposed to ultraviolet light.
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Photo credit: © NIH / IMAGE POINT FR / BSIP / Alamy / Afripics
License: Licensed
Model Released: No
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