Ucp1-CreER-ROSAtdTomatomice characterization. (A–C) Interscapular brown adipose depots from 8-week-old female Ucp1-CreER-ROSAtdTomato mice after tamoxifen was administered were sectioned and immunostained for RFP, UCP1, Perilipin1, and mammary markers KRT14 and KRT8. (D–G) Interscapular brown adipose depots and inguinal mammary gland from lactation Ucp1-CreER-ROSAtdTomato mice were sectioned and immunostained for RFP, UCP1, Perilipin1, and mammary markers KRT8.