RC74: Lysates

Formation of the mature 3' ends of the vast majority of cellular mRNAs occurs through cleavage and polyadenylation and requires a cleavage and polyadenylation specificity factor (CPSF) containing, among other proteins, CPSF-73 and CPSF-100. RC-74 is an exclusively nuclear protein found in HeLa cells that has similar characteristics to CPSF-100. Lik...