DNA-directed RNA polymerase I subunit RPA12

UniProtKB accession:  Q9P1U0

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UniProtKB description:  Core component of RNA polymerase I (Pol I), a DNA-dependent RNA polymerase which synthesizes ribosomal RNA precursors using the four ribonucleoside triphosphates as substrates. Can mediate Pol I proofreading of the nascent RNA transcript. Anchors into the Pol I active site to monitor transcription fidelity and cleave mis-incorporated 5'-ribonucleotides.