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Structures of the hmtASLMetCAU-Ψ27;f5C34 and hmtASLMetCAU-Ψ27. The ten lowest energy structures for the hmtASLMetCAU-Ψ27;f5C34 (a) and those for the hmtASLMetCAU-Ψ27 (b) are superimposed. To illustrate differences in the degree to which the bases of a family of structures converge, the ribose and phosphodiester bond details are not shown.
