LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Phenylalanine. Molecular model of the essential alpha-amino acid phenylalanine (C9.H11.N.O2), one of the 20 common amino acids used to form proteins. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red). Illustration.
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