Proliferative capacity of T98G cells stably transfected with a shRNA against RECQ1. A) Clonogenic assay performed in either control cells (left plate) and in clones silenced for RECQ1 (right plate). The figure shows colonies formed after plating 100, 200, 400, 800, 1600 and 3200 cells (well 1 to well 6, respectively). B) Graph showing the plating efficiencies expressed as colony forming capacity. Values represent the average ratio of the number of formed colonies to the number of cells seeded, expressed as percentage.