Figure 1. Time-series of microarray gene expression profiles.

Profiles were generated from heads of PTZ treated flies. Hierarchical clustering of female profiles alone (a), and both male and female profiles together (b). Male microarrays were described previously [7]. City Block similarity metric and average linkage methods were used for clustering of arrays. Each profile represents mean of normalized log₂ ratio (635/532) of four biological replicates with balanced dye-swaps. The cluster was generated using Acuity 4.0.