Circadian rhythm genes
Glucose Down-regulates Per1 and Per2 mRNA Levels and Induces Circadian Gene Expression in Cultured Rat-1 Fibroblasts
Based on the temporal expression pattern, the 176 probe sets were grouped into eight clusters by hierarchical clustering method.
The amplitude of mRNA accumulation and the phase of expression varied significantly among the 187 circadian genes they identified. Cluster analysis revealed eight classes of genes that appeared to be expressed co-ordinately in different phases.