From: RNA and Protein Synthesis
Copyright © 1994, Bruce Alberts, Dennis Bray, Julian
Lewis, Martin Raff, Keith Roberts, and James D Watson.
NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.
Alberts B, Bray D, Lewis J, et al. Molecular Biology of the Cell. 3rd edition. New York: Garland Science; 1994.
Molecular Biology of the Cell. 3rd edition.
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Figure 6-27A comparison of the structures of procaryotic and eucaryotic messenger RNA molecules
Although both mRNAs are synthesized with a triphosphate group at the 5' end, the eucaryotic RNA molecule immediately acquires a 5' cap, which is part of the structure recognized by the small ribosomal subunit. Protein synthesis therefore begins at a start codon near the 5' end of the mRNA (see Figure 6-24). In procaryotes, by contrast, the 5' end has no special significance, and there can be multiple ribosome-binding sites (called Shine-Dalgarno sequences) in the interior of an mRNA chain, each resulting in the synthesis of a different protein.
- Figure 6-27, A comparison of the structures of procaryotic and eucaryotic messen...Figure 6-27, A comparison of the structures of procaryotic and eucaryotic messenger RNA molecules - Molecular Biology of the Cell
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