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The Road to Ribosomes

ncbi.nlm.nih.gov · 3,489 words · saved by 1 readers

aInstitute for Systems Biology, Seattle, Washington 98105-6099 and Department of Cell Biology, University of Alberta, Edmonton, Alberta, Canada T6G 2H7

The genetic material of eukaryotes is surrounded by a nuclear envelope, which acts as a barrier to the free exchange of proteins and nucleic acids between the nucleoplasm and cytoplasm. Although the resulting physical separation of transcription and translation provides cells with a level of control of gene expression not available to prokaryotes, it also demands the presence of a transport system to selectively move macromolecules between the two compartments. Such a system must be capable of discriminating between a wide variety of structurally and functionally distinct molecules and may…

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