Fig. 7. Transplantation of Dgat1^+/+ mammary epithelium into Dgat1^–/– recipient mice. Recipient mammary glands were cleared of endogenous epithelium and then implanted with donor epithelium. Recipient mice were mated, and epithelial morphology was analyzed at P18 by wholemounts (A-D) or histology (E-H). Shown are recipient (unoperated) control glands (A,C,E,G) and recipient glands that received transplanted epithelium (B,D,F,H). Control transplantations are shown for comparison (A,B).