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Fig. 5. The progeny of parity-induced mammary epithelial cells marked by the
expression of ß-galactosidase (blue) included LREC that were doubly
labeled by 5BrdU and 3HtdR (arrows) in mammary transplant
outgrowths in the cleared fat pads of doubly pulsed female hosts. This
indicated that during the process of expansive self-renewal some of these
cells become asymmetrically dividing LREC. The red brackets outline the region
of the image where the plane of section is tangential to the long axis of the
duct, thus exposing the suprabasal epithelial layer. Scale bar: 10 µm.
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