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There are three known prokaryotic release factors involved in the termination of translation. RF1 and RF2 are so called class 1 release factors and RF3 a class 2 release factor. * ''RF1'' recognize stop codons UAA and UAG. * ''RF2'' recognize stop codons UAA and UGA. * ''RF3'' promotes termination by either factor by accelerating dissociation. The release factors provide the means of termination by having a conformation that mimics that of tRNA molecules. The decoding release factor binds to the A site of the ribosome and directly recognises the stop codon. Once RF1 (or RF2) is bound to the ribosome, the polypeptide is released, and the ribosome and release factors disassemble, thus completing the process of translation. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「prokaryotic release factors」の詳細全文を読む スポンサード リンク
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