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Fig. 2 | Biology Direct

Fig. 2

From: Trinity of G-tetrads and origin of translation

Fig. 2

Emergence of the quadruplex domain (QD) in the quadruplex world. A G-tetrad with cation in the center. B Steps in prebiotic polymerization of quadruplexes from free guanines (G) stacked into G-tetrads. Only G-tetrads (gray disks) and phosphodiester backbone (arrows) are shown. Curved lines in QDs correspond to Z-shaped G-loops

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Biology Direct

ISSN: 1745-6150

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