Fig. 6.

Heat map or clustering technique, which place genes in groups based on how similarly their gene expression patterns behave, a typical approach of displaying gene expression data can help discover the genes that are often regulated in a given circumstance, showing the expression patterns of 9 genes in biofilm cells compared to planktonic cells over a period of seven-days. The columns in the heat map indicate the comparison between the studied genes in biofilm at different days of incubation and the rows represent the expression of these genes relative to planktonic cell. The colors indicate scaled expression of genes (folds log10). Yellow and red represent up-and downregulated gene expression respectively color density indicating levels of fold change was displayed. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)