ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Genetic code. Conceptual computer artwork of letters representing the genetic code superimposed on a human head. The letters represent the four nucleotide bases of DNA (deoxyribonucleic aid). The bases are: cytosine, guanine, adenine and thymine. DNA encodes the body's genetic information.
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