LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Cytosine. Molecular model of the nucleobase cytosine (C4.H5.N3.O). This is one of the bases found in the genetic molecules DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), where it is paired with guanine. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red). Illustration.
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