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Terrestrial Origins and Evolution
The new 2° structure of 23S rRNA


The new 2° structure based on data from high-resolution 3-D models (from E. coli). This structure accurately represents all helices, and contains seven domains (Domain 0 in orange; Domains I-VI are colored as in panel 1a). In the traditional 2° structure shown above, a central single-stranded region of rRNA is partitioned between multiple domains. In the new 2° structure, that same rRNA is double-helical and is fully contained within Domain 0. Credit: Petrov et al. (2013)

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