SPARC-null epididymal fat pads contain significantly more large adipocytes than wild-type fat pads. Fat pads were treated with collagenase, and adipocytes were fractionated by centrifugation. Isolated adipocytes were photographed on a hemocytometer slide ( , wild-type adipocytes; ■, SPARC-null adipocytes), and captured images were imported into nih IMAGE software for quantification. (Scale bars, 200 μm.) Wild-type (423 cells, gray bars) and SPARC-null (717 cells, black bars) adipocytes contributed to the distribution. The histogram was generated from the data reported in Tables 2 and 3.