From: The transcriptional terminator XRN2 and the RNA-binding protein Sam68 link alternative polyadenylation to cell cycle progression in prostate cancer
a,b, Western blot (WB) analysis and Coomassie blue staining of the GST pull-down assay (n = 2) performed using LNCaP nuclear extracts (N.E.) in presence of GST-Sam68 full-length (a) and deletion mutants (b). GST was used as negative control (a,b). A scheme of GST-Sam68 fusion proteins is also shown (b).