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A convenient RNA synthesis using a biotin-streptavidin interaction and a photocleavable protecting group is described. The biotinylated photocleavable group was introduced at the 2'-position of the uridine derivative. Using the phosphoramidite 12, we attempted the synthesis of a 21mer RNA, which is pure enough to show potent RNAi activity compared with a conventionally prepared and HPLC-purified 21mer RNA with the same sequence.
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Tomaya et al. (2010) studied this question.
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