Principal Component Analysis of transcript levels. PCA results for all N. furzeri RNA-seq datasets are shown as biplots of the first vs. the second (A) and first vs. third component (B). The first component preferentially reflected the variation introduced by age whereas second and third components represented differences in strain and tissue, respectively.
Petzold et al. BMC Genomics 2013 14:185 doi:10.1186/1471-2164-14-185