Hierarchical clustering of gene expression data.

MM.1S cells were treated with 3 μM 2ME2 for the indicated times and subjected to oligonucleotide array analysis. The data were then analyzed using DNA-Chip analyzer (DChip); 61 genes are induced in response to 2ME2 treatment at indicated time intervals. Each row represents a gene. The expression index is standardized genewise to have mean 0 and standard deviation 1 (−3.0, blue to +3.0, red).