Figure 3From: A factor model to analyze heterogeneity in gene expressionPrincipal component analysis: individuals representation. Birds are colored according to their weight split into 3 classes: lean (green), intermediate (red) and fat (black). (A) PCA generated with the raw expression of the 688 differentially expressed genes. (B) PCA generated with the factor-adjusted expression of the 688 differentially expressed genes.Back to article page