Fig 1.

Dendrogram of a two-way hierarchical clustering of 6,141 genes. Samples, colored according to type, are indicated to the left: red, AC; green, SCC; purple, normal; blue, SCLC; black, LCC; orange, carcinoids; brown, fibroblasts; and pink, NSLC. Each column represents a particular gene. Squares are colored according to the log mean expression ratios across four replicates. Red indicates expression ratios greater than 1 (overexpression), green less than 1 (underexpression), and black roughly equal to 1 (no expression change) in relation to the reference sample.