Gene signatures. (A) A heatmap displays the normalized expression values of 151 genes that comprise the All IPF model, derived from 6 normals and 11 IPF samples (rows = genes; columns [left to right] = 6 normals, 6 biopsies and 5 explants). A partial gene list (top ten) is shown to the right. (B) A heatmap and partial gene list for the IPF Biopsy model, 153 genes derived from 6 normals and 6 IPF biopsies. (C) Heatmap and partial gene list for the IPF Explant model, 70 genes derived from 6 normals and 5 IPF explants.