DNA packaging, artwork

DNA packaging, artwork

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Credit: PETER GARDINER/SCIENCE PHOTO LIBRARY

Caption: DNA packaging. Computer artwork showing how DNA (deoxyribonucleic acid) is packaged within a cell nucleus. A double strand of DNA is at bottom. Each strand consists of a sugar-phosphate backbone (horizontal blue line) attached to nucleotide bases. There are four nucleotide bases. The two strands twist into a double helix (lower right). The DNA double helix is tightly coiled around histone proteins (red). Eight histone proteins are tightly packaged together to form a nucleosome (centre left), which is further packaged into chromosomes (top left). In each human cell (top right) are 23 pairs of chromosomes, which contain all the body's genetic information.

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Keywords: artwork, biological, biology, cell, chromatid, chromatids, chromatin, chromosome, condensed, deoxyribonucleic acid, dna, double helix, euchromatin, genetics, helical, heterochromatin, histone, histones, illustration, molecular, molecule, nucleosome, nucleus, packaged, packaging, protein, structure, white background

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