Human breast cancer stem cells in 1ml at a concentration of 1 x 106 cells/ml. Cells are available in frozen vials, shipped on dry-ice, or growing in a tissue culture flask, shipped at room temperature. The breast cancer stem cells were derived from primary human breast cancer tissue and maintained in ProMab Biotechnologies' Cancer Stem Premium™ (Catalog # 20101) and subcultured every 7-10 days for less than 3 passages.