Figure 2From: Tungsten carbide cobalt nanoparticles exert hypoxia-like effects on the gene expression level in human keratinocytesPrinciple component analyses. PCA of differentially expressed genes in HaCaT cells exposed for 3 h and 3 d to 30 μg/ml WC, 33 μg/ml WC-Co nanoparticles and 3 μg/ml CoCl2. Each symbol represents a biological replicate.Back to article page