Figure 3

PCA of the bovine skeletal muscle gene expression profiles. (A) PCA plot shows the two principal components of greatest variation which cover 42.8% (x-axis) and 28.4% (y-axis) of the total variance. (B) PCA plot excluding Holstein samples; x-axis and y-axis cover 56.2% and 14.7% of the total variance, respectively. Green triangles represent one set of controls (K, mixed-breed), green squares the second set of controls (C, Holstein), red trapeziums the animals positive for corticosteroid treatment at histological analyses and LC-MS (P) and black circles the unknown animals.