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A transcription elongation factor complex that suppresses RNA polymerase II pausing, and may act by promoting proper alignment of the 3\'-end of nascent transcripts with the polymerase catalytic site. Consists of a transcriptionally active Elongin A subunit (about 100 kDa) and two smaller Elongin B (about 18 kDa) and Elongin C (about 15 kDa) subunits. [PMID:12676794]
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