Assertion: bone marrow's cell | /r/CapableOf | act as stem cells
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Source sentences:
text: However, in a recent study, in which two molecular tags—the fluorescent marker Dil, and an adenovirus vector carrying lacZ tags—were used to label the ependymal cells that line the entire CNS ventricular system of adult rats, it was shown that these cells could, indeed, act as stem cells.
text: Although the adult MBCD34+ and MBFlk1+ cells function in some ways like stem cells, they are usually regarded as progenitor cells.