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51.7 MB (562.2 KB compressed)
4250 x 4250 pixels
36.1 x 36.1 cm ⏐ 14.2 x 14.2 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Serotonin neurotransmitter molecule. Atoms are represented as spheres and are colour-coded: carbon (black), hydrogen (white), nitrogen (blue) and oxygen (red).
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