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Results: 3

1.
Figure 1

Figure 1. From: Deleterious mutations destabilize ribosomal RNA in endosymbiotic bacteria.

Secondary structure of Domain I of the 16S rRNA (15, 16). (A) Structure for the endosymbiont B. aphidicola of the aphid Schlechtendalia chinensis, showing differences from corresponding positions in Escherichia coli. (B) Stabilities were calculated separately for each of the six labeled regions.

J. David Lambert, et al. Proc Natl Acad Sci U S A. 1998 April 14;95(8):4458-4462.
2.
Figure 2

Figure 2. From: Deleterious mutations destabilize ribosomal RNA in endosymbiotic bacteria.

Stabilities of Domain I in endosymbiotic and free-living bacteria. (A) Relationships of taxa included in this study, based on molecular phylogenetic studies (2–5, 18–22). (B) Stabilities (−ΔG) summed over Domain I for each organism. Related free-living and endosymbiotic organisms are given the same symbol shape, with free-living taxa represented by a solid symbol. The horizontal axis shows distance from E. coli, measured as proportion sequence differences in the 16S rRNA.

J. David Lambert, et al. Proc Natl Acad Sci U S A. 1998 April 14;95(8):4458-4462.
3.
Figure 3

Figure 3. From: Deleterious mutations destabilize ribosomal RNA in endosymbiotic bacteria.

Positions of destabilizing substitutions of endosymbionts related to E. coli, assuming both the tree topology and the mapping of substitutions that minimize independent events. Destabilizing substitutions are divided into two categories, those causing a stem mismatch (MM) and those causing an AU or GU pair to replace a GC pair in a stem (AU). Where two substitutions are associated with an event in either category (e.g., an AU pair replaces a GC pair), only one destabilization event is mapped onto the tree. Even with these assumptions, which minimize independent events, most destabilizing substitutions are unique to individual lineages, indicating largely independent evolution of destabilization.

J. David Lambert, et al. Proc Natl Acad Sci U S A. 1998 April 14;95(8):4458-4462.

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