Research Article

The Protective Role of Hydrogen Sulfide and Its Impact on Gene Expression Profiling in Rat Model of COPD

Figure 4

Heat map of unsupervised hierarchical cluster analysis of representative genes. Data from individual subjects and individual genes are shown in columns and rows separately. The color represents the intensity of the signal (). Green bars represent low expression levels, red bars represent high expression levels, and black bars represent no change relative to normalized median gene expression values.