Genes with expression profiles associated with deltamethrin resistance. Clustering analysis was performed on the 46 transcripts showing a correlation between their expression profile and deltamethrin resistance (RR50) and kdr mutation frequency. Clustering of transcripts was based on differences between mean Log2 ratios in each population versus reference using Euclidean distance and complete linkage algorithm. Colour scale (green to red) indicates fold change versus reference strain. + and - indicate a positive (r > 0.85) or negative (r < -0.85) correlation with deltamethrin resistance or kdr mutation frequency.