55.4 MB (333.4 KB compressed)
4399 x 4399 pixels
37.3 x 37.3 cm ⏐ 14.7 x 14.7 in (300dpi)
LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Vitamin B3 (nicotinic acid), molecular model. Insufficient intake leads to a disease called pellagra. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red).
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