Presence of FIZZ1 and YM1 protein in BAL fluid. BAL fluid samples from RAG2-/-, STAT6xRAG2-/- or IL-4RαxRAG2-/- mice treated as described in Figure 4 were collected. FIZZ1 and YM1 protein secreted into the BAL fluid in the three groups of mice was detected by western blotting (A). Equal amounts of total protein were loaded into every well. Each lane represents an individual mouse. Densitometry analysis was performed on the autoradiograms from each blot and the values are represented on a graph (B). White bars represent densitometry values for FIZZ1, black bars represent YM1. * p < 0.01; # p < 0.001. n = 3 for each group.