Figure 3From: An imbalance in progenitor cell populations reflects tumour progression in breast cancer primary culture modelsUltrastructural identification of putative progenitor cells in primary cultures. HMEC and tumour primary cultures analyzed by TEM were observed to grow as multi-layers, with basally-located cells having plump morphologies (a, arrow) compared to the attenuated morphologies of apically-located cells. Filament-rich cells (b, arrows) were layered with glycogen-rich cells (b, arrowhead). A schematic representation of cellular organization is shown in (c).Back to article page