Transcription of a human U2 small nuclear RNA ( snRNA ) -encoding gene in HeLa cells requires a distal enhancer element , which is composed of one octamer motif ( Oct ) and three Sp 1-binding sites .
transcription of a human u2 small nuclear rna ( snrna ) -encoding gene in hela cells requires a distal enhancer element , which is composed of one octamer motif ( oct ) and three sp 1-binding sites .
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