CD68 expression in macrophages in the omental adipose tissues. Adipose tissue was dehydrated and embedded to make paraffin section. Primary antibodies against CD68 (1:50) was used. Hematoxylin staining was performed (400 ×). Arrows indicated positive CD68-staining. (A) Ad36 (+); (B) Ad36(+), obese; (C) Ad36(+), non-obese; (D) Ad36 (-); (E) Ad36(-), obese; (F) Ad36(-), non-obese.