Figure 6. Luciferase immunohistochemistry of parous glands.

Mammary glands were taken from pregnant mice midway through their first pregnancy, at the end of the nursing of their pups, and roughly one month after pups were weaned as well as from age matched virgin controls. Strong luciferase staining can be seen both in the alveolar bunches of the parous glands, as well as in the ductal regions and in the milk (black arrow). After pups are weaned, the amount of luciferase expressing MaSCs returns back to similar levels as aged matched virgin controls. Scale bar represents 20µm.