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| Eukaryotic Small Ribosomal Subunit (40S) ： ウィキペディア英語版 |
Eukaryotic small ribosomal subunit (40S)
Ribosomal particles are denoted according to their sedimentation coefficients in Svedberg units. The 40S subunit is the small subunit of eukaryotic 80S ribosomes. It is structurally and functionally related to the 30S subunit of 70S prokaryotic ribosomes. However, the 40S subunit is much larger than the prokaryotic 30S subunit and contains many additional protein segments, as well as rRNA expansion segments.
==Function==
The 40S subunit contains the decoding center which monitors the complementarity of tRNA and mRNA in protein translation. It is the target of most eukaryotic initiation factors and also interacts with the internal ribosome entry site of the hepatitis C virus. More information can be found in the articles on the ribosome in general, the eukaryotic ribosome (80S), and the article on protein translation.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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