Figure 7

PDGF-Rα expression patterns are similar at the alveolar entry ring and base. The "low" and "high" PDGF-Rα subpopulations were enumerated at the alveolar entry ring and base, and the results are summarized in the column graphs representing numbers for the P4 (A) and P12 (B) animals. Each subpopulation is expressed as a percentage of the total numbers of cells at each respective level (ring or base). N = 3 mice for each age. For each mouse, at least 45 alveoli were examined.