Expression of CCL2, 3, and 9 in lung macrophages of WT, 4L and 9 V/null mice. Lung sections from WT (left), 4L (middle) and 9 V/null (right) mice at the age of 28-wk were the same as in Figure 2 and 9. Abundant large storage cells in 9 V/null lungs were positive for CCL2, CCL3, and CCL9 (e.g., arrows). 4L and WT lungs were negative. The scale bars are 20 μm. Magnification = 400×.