Cluster analysis of the gene expression data.

After 60 min of perfusion under baseline conditions, isolated mouse lungs were perfused for another 180 min with Pam₃Cys (160 ng/mL, n = 5), MALP-2 (25 ng/mL, n = 5), LPS (1 µg/mL, n = 3) or under control conditions (n = 5). The different colors (red, brown, green, blue) identify genes that clustered together.