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Insulin crystals, from NASA's website.
 Credit: NASA/Marshall. This image has been released into the
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current 15:08, November 7, 2007 320 × 224 (13 KB) PhloxBot ( Talk | contribs) Insulin crystals, from NASA's website. [http://science.nasa.gov/newhome/headlines/msad20sep99_1.htm] Credit: NASA/Marshall.<br />''This image has been released into the ''' public domain''' by the copyright holder, or its copyr
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