Figure 1.

Morphology of adipocytes isolated from rat retroperitoneal (RP) adipose tissue. Between 4 and 19 weeks of age, rats were fed low- and high-fat diets, respectively. Thereafter, rats in each dietary group received drinking water containing either 1.51% l-arginine·HCl or 2.55% l-alanine (isonitrogenous control) for 12 weeks. At the end of the feeding experiment, RP adipose tissue was dissected and adipocytes were isolated. Data are expressed as means ± SEM (n = 8/treatment group). Magnification scale was set at ×10. The scale bar in all panels of this figure is 100 µm.