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Fig. 3. Mammary epithelial expression of MYC from D12.5-D15.5 of pregnancy promotes
morphological changes consistent with precocious lactation. Hematoxylin and
Eosin staining of number four mammary gland histological sections from MTB and
MTB/TOM mice induced with doxycycline from D12.5-D15.5 of pregnancy and
harvested at 1-day increments from D12.5 of pregnancy through day 1 postpartum
(D1PP) (A-P). Uninduced MTB/TOM glands harvested at increasing intervals
during lactation are also shown (Q-T). Results are representative of sections
from three animals per group.