with ice-cold PBS. Fat pads (100 mg, n = 4/mouse) were preincubated for 1 h in
140 μl of DMEM (Life Technologies) containing 2% fatty acid-free serum
albumin (Sigma-Aldrich). Subsequently, fat pads were incubated in 250 μl
of KRH buffer (125 mM NaCl, 5 mM KCl, 1.8 mM CaCl2, 2.6 mM MgSO4, 5 mM HEPES, pH
7.2) plus 2% BSA (fatty acid free) for 2h at 37°C. Free glycerol content
was quantified for each sample in the medium using the Free Glycerol
Determination Kit (Wako Diagnostics). Glycerol release from each sample was
normalized to the weight of each fat pad.