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FIGURE 6-3 Detailed structure of polynucleotide polymer. The structure shows base patting between purines (in blue) and pyrimidines (in yellow), and the phosphodiester linkages of the backbone. (Source: Adapted From Didcerson RE 1983. Scientific Arnencan 549: 94 Illustration, frvtng Ceis. Image from Irving Geis Collection/Howard Hughes Medical Institution. Wot to be reproduced without permission.)

adenine

NH, purine purine

guanine

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