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Organelles in which the splicing and excision reactions that remove introns from precursor messenger RNA molecules occur. One component of a spliceosome is five small nuclear RNA molecules (U1, U2, U4, U5, U6) that, working in conjunction with proteins, help to fold pieces of RNA into the right shapes and later splice them into the message.

Year introduced: 1993

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Tree Number(s): A11.284.430.106.279.345.850

MeSH Unique ID: D017381

Entry Terms:

  • Spliceosome

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