CPSF7Cleavage and polyadenylation specificity factor subunit 7 is a protein that in humans is encoded by the CPSF7 gene.FunctionCPSF7, also known as CFIm59, is the cleavage factor of two closely associated protein complexes in the 3' untranslated region of a newly synthesized pre-messenger RNA molecule used in gene transcription. CPSF7 is one of three Cleavage and polyadenylation specificity factors, the other two being CFIm25 and CFIm68.