Principal component analysis and the heat map of the expression data. (A) Patterns of variation are presented in the subspace of the first and the third principal components (PC1 and PC3, respectively). (B) Patterns of variation are presented in the subspace of the first, second and third PCs. (C) Age-related expression at the level of GO categories for C and SR flies under all dietary conditions (gene categories up- or downregulated in the old flies).
Doroszuk et al. BMC Genomics 2012 13:167 doi:10.1186/1471-2164-13-167