3D depiction of principal component analysis (PCA) of gene expression in cultures treated with vehicle, 30 μM CdCl
, or 100 μM CdCl
. Sixty five genes that met the criteria defined by the RT2 Profiler PCR Array Data Analysis v3.5 software from SABiosciences were uploaded to the ArrayTrack program. The PCA is based on the log2 ratios and expression profiles across all the 65 genes in the PCR array. The blue, green, and red dots indicate cultures treated with vehicle, 30 μM CdCl2, and 100 μM CdCl2, respectively. The first three principal components are plotted. The captured variance of PC1 (first principal component), PC2 (second principal component; the label is not shown), and PC3 (third principal component) were 45.79%, 31.70%, and 10.12%, respectively.