Figure 4.

PCA plots (after ANOVA p < 0.01) after normalization of the apolar fraction of HepG2 cells analyzed by GC-MS. A: Spheres with the same colour are technical replicates of the same sample per passage number. For denotation of the colours, see legend Figure 3. B: Samples re-grouped with regard to treatment (irrespective of passage number). DMSO: green; TCDD: red.

Ruiz-Aracama et al. BMC Genomics 2011 12:251   doi:10.1186/1471-2164-12-251
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