Fig. 4.

Number of unilocular, UCP1-negative multilocular and UCP1-positive multilocular adipocytes in different depots of the adipose organ of C57BL/6J mice maintained at 28°C or 6°C for 10 days. In the cold-acclimated group, the number of UCP1-positive multilocular adipocytes increased significantly in the anterior subcutaneous and in the abdominopelvic depot. Numbers above columns indicate the average density of TH-positive parenchymal fibers in each depot (fiber number/100 adipocytes). Data are mean ± SEM. *P < 0.05, **P < 0.01.