LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Histidine. Molecular model of the essential amino acid histidine (C6.H9.N3.O2). It is one of the amino acids that is a precursor to proteins (proteinogenic). Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red). Illustration.
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