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. Author manuscript; available in PMC: 2014 Jan 6.
Published in final edited form as: Cancer Lett. 2012 Apr 17;323(1):10.1016/j.canlet.2012.03.041. doi: 10.1016/j.canlet.2012.03.041

Figure 3.

Figure 3

Identification of SP cells in Fine Needle Aspirates (FNAs) taken from palpable clinical breast tumours. Staining FNA samples with 2.5μg/ml Hoechst 33342 dye identified an SP of 0.4% (A). Adding 50μm verapamil prior to the Hoechst incubation (HS VP) inhibited Hoechst efflux from the SP (B). An example of an SP-negative FNA sample (C).