Superabundant microRNAs are transcribed from human rDNA spacer promoters insulated by CTCF
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microRNAs are ~22-nucleotide RNAs processed from primary transcripts and exported from the nucleus to repress gene expression by base-pairing to mRNAs. Unexpectedly, we find that the highest levels of RNA polymerase II (Pol II) at human microRNA genes are with... ...
