Fig. 3From: Hybrid clone cells derived from human breast epithelial cells and human breast cancer cells exhibit properties of cancer stem/initiating cellsM13HS hybrid clone cells harbor a unique population of ALDH-positive cells. The frequency of ALDH-positive cells within the investigated cell lines was determined by flow cytometry using AldeRed fluorescent dye. Shown is the mean relative frequency of ALDH-positive cells of three independent experiments analyzing cells of different passages. Control cells were treated with the ALDH inhibitor DEABBack to article page