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Figure 3.
Fig. 3. Ribbon plots (25) of the COOH-terminal domain of
ribosomal protein S5 (20) (PDB accession code 1PKP), RNase P
protein, and domain IV of the ribosomal translocase, EF-G (21)
(PDB accession code 1DAR). Left-handed   crossovers
are highlighted in yellow. Topological similarities suggest
evolutionary divergence from a primordial ribosomal ancestor.
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