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Differences in eubacterial and archeal E site ribosomal proteins. The globular portions of H. marismortui ribosomal proteins L44e (green) and L15e (blue) are replaced by L33 (red) and L31 (yellow), respectively, in the D. radiodurans ribosome (Harms et al. 2001). However, the loop portion of L44e that interacts with the 3′ terminus of the E site-bound minihelix (orange) overlaps with an extension of L31.
