d, Proliferation of MCF7.control cells (clones 37 and 38; closed squares and circles, respectively, solid lines), MCF7.beclin1 cells (clones 1, 6, 17; open squares, circles, triangles, respectively, solid lines) and MCF7.beclin1stop cells (clone 70, closed triangles, dotted line). Results represent mean Absorbance (A) (±s.e.m.) for six wells; similar results were obtained in three independent experiments. 