Expression of human snRNA genes from beginning to end.
In addition to protein-coding genes, mammalian pol II (RNA polymerase II) transcribes independent genes for some non-coding RNAs, including the spliceosomal U1 and U2 snRNAs (small nuclear RNAs). snRNA genes differ from protein-coding genes in several key respects and some of the mechanisms involved in expression are gene-type-specific. For example, snRNA gene promoters contain an essential PSE (proximal sequence element) unique to these genes, the RNA-encoding regions contain no introns, elo...Expand abstract
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