Identification of Putative Ortholog Gene Blocks Involved in Gestant and Lactating Mammary Gland Development: A Rodent Cross-Species Microarray Transcriptomics Approach

Figure 4

K-means clustering of the differentially expressed gene list with trajectory expression profile signatures. Gene expression data from the 807 tags comprising the significant altered gene transcript list (z-score > ±1.50) were best represented by six K-means clusters consisting of distinct up (red) and down (green) patterns of expression. Developmental stage time points and fold change are indicated on the x- and y-axes, respectively. The numbers of tags in each cluster are indicated. A black pseudoline representing the general (average) pattern of expression has been superimposed on each cluster.