Component of the cleavage and polyadenylation factor I (CF I)%3B CF 1%2C composed of the CF 1A complex (Rna14p%2C Rna15p%2C Clp1p%2C Pcf11p) and Hrp1%2C is involved in cleavage and polyadenylation of mRNA 3' ends%3B interacts with the A-rich polyadenylation signal in complex with Rna14p and Hrp1p%3B mutant displays reduced transcription elongation in the G-less-based run-on (GLRO) assay%3B required for gene looping and maintenance of genome stability