LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Molecular model of the red-orange pigment beta-carotene (C40.H56). Found in plants and fruits, this chemical (a hydrocarbon and terpenoid) is a metabolic precursor to vitamin A. Atoms are represented as spheres and are colour-coded: carbon (grey) and hydrogen (white).
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