Distinct populations of hematopoietic stem cells (HSCs) that preferentially generate specific types of blood cells can be identified based on abundance of a single surface protein, according to a study published online on April 26 in the Journal of Experimental Medicine. The concept that HSCs, which give rise to all types of blood cells, are heterogeneous is not new, but distinguishing distinct types of HSCs from one another has proven challenging. Hiromitsu Nakauchi and colleagues set out to find a way to identify and study different HSC populations...
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