Figure 2
From: Tumour-stromal interactions: Role of the stroma in mammary development
Photomicrographs illustrating patterns of DNA synthesis in an end bud, its immediately subtending duct, and a lateral branch (a), as well as in a duct distant from the growth front (b). [3H]Thymidine autoradiographs were stained with alcian blue. Large arrows, fibrous sheath around end bud; small arrows, DNA synthetic cells. Magnification ×250.