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lariat structure |
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lariat structure [ler′ē·ət] a ring of intron segments that has been spliced out of a messenger ribonucleic acid molecule by enzymes. Some introns form a long tail attached to the ring, giving the structure the appearance of a microscopic cowboy lariat. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| In the splicing reaction, which occurs via two transesterification reactions, the branch site adenosine (A24) 2'-OH acts as a nucleophile and attacks at the 5'-phosphate on the intron site to form a lariat structure. |
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