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Figure 1 | Molecular Medicine

Figure 1

From: Sampling-Dependent Up-regulation of Gene Expression in Sequential Samples of Human Airway Epithelial Cells

Figure 1

Dendrogram illustrating the relationship of global gene expression in right lung airway epithelium and left lung airway epithelium among different individuals. Normalized expression levels for each of the 4227 expressed genes were analyzed using the GeneSpring program by hierarchical clustering with Spearman correlation. Nonsmokers are indicated as “NSX,” and smokers as “SX,” where “X” is the number assigned to the individual. Right lung samples are labeled “RX” and left lung samples “LX,” where X indicates the sampling order. Note that this assessment did not segregate samples based on location (R versus L), order of sampling (R1 versus R2), or smoking status (NS versus S), indicating that there are no effects of the sampling procedure on global patterns of gene expression. As expected, samples from the right and left lungs of the same individual tended to cluster together.

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