Molecular guardian of cell's RNA identified

When most genes are transcribed, the nascent RNAs produced are not quite ready to be translated into proteins -- they have to be spliced first, where non-coding sequences are removed and the remaining coding sequences are joined to form a final mRNA. U1, a splicing component, has a second, equally important role in gene expression: To enable sequences to be read out into their transcripts in their entirety, rather than prematurely stopped.

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